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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS Authentication Proxy Race Condition Lets Remote Users Bypass Access Controls
SecurityTracker Alert ID:  1022935
SecurityTracker URL:  http://securitytracker.com/id/1022935
CVE Reference:   CVE-2009-2863   (Links to External Site)
Date:  Sep 23 2009
Impact:   Host/resource access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Cisco IOS. A remote user can bypass access controls.

On IOS devices configured with Authentication Proxy for HTTP(S), Web Authentication, or the consent feature, a remote user can trigger a race condition to bypass the authentication proxy server or the consent web page and access the requested resource.

Systems are affected if at least one valid authenticated session or accepted consent session exists.

Cisco has assigned Cisco Bug ID CSCsy15227 to this vulnerability.

The Firewall Authentication Proxy for FTP and Telnet Sessions is not affected.

Impact:   A remote user can access ostensibly protected network resources.
Solution:   The vendor has issued a fix.

A patch matrix is available in the vendor's advisory.

The vendor's advisory is available at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml

Vendor URL:  www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml (Links to External Site)
Cause:   State error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Wed, 23 Sep 2009 12:15:00 -0400
Subject:  Cisco Security Advisory: Cisco IOS Software Authentication Proxy

--===============1351044148==
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Content-Transfer-Encoding: 8bit
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Cisco Security Advisory: Cisco IOS Software Authentication Proxy
Vulnerability

Advisory ID: cisco-sa-20090923-auth-proxy

Revision 1.0

For Public Release 2009 September 23

+---------------------------------------------------------------------

Summary
=======

Cisco IOS® Software configured with Authentication Proxy for HTTP(S),
Web Authentication or the consent feature, contains a vulnerability
that may allow an unauthenticated session to bypass the
authentication proxy server or bypass the consent webpage.

Cisco has released free software updates that address this
vulnerability.

There are no workarounds that mitigate this vulnerability.

This advisory is posted at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml

Note: The September 23, 2009, Cisco IOS Security Advisory bundled
publication includes eleven Security Advisories. Ten of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each advisory lists the releases that correct the
vulnerability or vulnerabilities detailed in the advisory. The
following table lists releases that correct all Cisco IOS Software
vulnerabilities that have been published on September 23, 2009, or
earlier.

http://www.cisco.com/warp/public/707/cisco-sa-20090923-bundle.shtml

Individual publication links are in "Cisco Event Response: Semiannual
Cisco IOS Software Advisory Bundled Publication" at the following
link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep09.html

Affected Products
=================

Vulnerable Products
+------------------

Devices running affected versions of Cisco IOS Software and
configured with Authentication Proxy for HTTP(S) or Web
Authentication or the consent feature are vulnerable.

To determine the Cisco IOS Software release that is running on a
Cisco product, administrators can log in to the device and issue the 
"show version" command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying
text similar to "Cisco Internetwork Operating System Software" or
"Cisco IOS Software." The image name displays in parentheses,
followed by "Version" and the Cisco IOS Software release name. Other
Cisco devices do not have the "show version" command or may provide
different output.

The following example identifies a Cisco product that is running
Cisco IOS Software Release 12.3(26) with an installed image name of
C2500-IS-L:

    Router#show version
     Cisco Internetwork Operating System Software
     IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
     Technical Support: http://www.cisco.com/techsupport
     Copyright ©) 1986-2008 by cisco Systems, Inc.
     Compiled Mon 17-Mar-08 14:39 by dchih
    
     <output truncated>

The following example shows a product that is running Cisco IOS
Software release 12.4(20)T with an image name of
C1841-ADVENTERPRISEK9-M:

    Router#show version
    Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
    Technical Support: http://www.cisco.com/techsupport
    Copyright ©) 1986-2008 by Cisco Systems, Inc.
    Compiled Thu 10-Jul-08 20:25 by prod_rel_team
    
    <output truncated>

Additional information about Cisco IOS Software release naming
conventions is available in "White Paper: Cisco IOS Reference Guide"
at the following link: http://www.cisco.com/warp/public/620/1.html.

To determine if your device is configured with either Authentication
Proxy for HTTP(S), Web Authentication or the consent feature, log
into the device and issue the "show running-config" command.

The following example identifies firewall authentication proxy
services using the ip auth-proxy under the proxy rule name
example_auth_proxy_name:

    Router#show running-config
    <output truncated>
    
     !
     ! Set up the aaa new model to use the authentication proxy.
     !
    
     aaa authorization auth-proxy default group
    
     !
     ! Apply a name to the authentication proxy configuration rule.
     !
    
     ip auth-proxy name example_auth_proxy_name http
    
     !
     ! Apply the authentication proxy rule at an interface.
     !
    
     interface e0 
      ip auth-proxy example_auth_proxy_name
    
     !
    
    <output truncated>

The following example identifies firewall authentication proxy
services running for HTTP under the proxy rule name
example_auth_proxy_name, using the ip admission commands. This is the
same configuration as Web Authentication:

    Router#show running-config
    <output truncated>
    
     !
     ! Set up the aaa new model to use the authentication proxy.
     !
    
     aaa authorization auth-proxy default group
    
     !
     ! Apply a name to the authentication proxy configuration rule.
     !
    
     ip admission name example_auth_proxy_name proxy http inactivity-time 60
    
     !
     ! Apply the authentication proxy rule at an interface.
     !
    
     interface FastEthernet0/1
      ip admission example_auth_proxy_name
    
     !
    
     <output truncated>

The following example identifies a device configured with the consent
feature under the consent rule name example_consent_rule:

    Router#show running-config
    <output truncated>
    
     !
     ! Apply a name to the consent configuration rule.
     !
    
     ip admission name example_consent_rule consent
    
     !
     ! Apply the consent rule at an interface.
     !
    
     interface FastEthernet 0/0 
      ip admission consent-rule_rule
    
     !
    
    <output truncated>

Products Confirmed Not Vulnerable
+--------------------------------

The following products and features are not affected by this
vulnerability:

  * Cisco IOS XR Software
  * Cisco IOS XE Software
  * Firewall Authentication Proxy for FTP and Telnet Sessions
  * Cisco IOS devices not configured with Authentication Proxy for
    HTTP(S) or the consent feature

No other Cisco products are currently known to be affected by this
vulnerability.

Details
=======

The Cisco IOS Firewall authentication proxy feature allows network
administrators to apply specific security policies on a per-user
basis. With the authentication proxy feature, users can log in to the
network or access the Internet via HTTP, and their specific access
profiles are automatically retrieved and applied from a CiscoSecure
ACS, or other RADIUS or TACACS+ authentication server. The user
profiles are active only when there is active traffic from the
authenticated users. Web Authentication feature leverages the
underlying authentication proxy feature.

The consent feature for Cisco IOS routers enables organizations to
provide temporary Internet and corporate access to end users through
their wired and wireless networks by presenting a consent webpage.
The consent feature can be used with or without requesting a username
and password, but still leverages the underlying authentication proxy
feature.

This vulnerability allows a session to be permitted without first
being authenticated by the authentication proxy, or to be permitted
without first acknowledging the consent webpage. At least one
successfully authenticated session or accepted consent session must
exist for the vulnerability to be exposed. When this occurs, the
RADIUS or TACACS+ server will show subsequent users as authenticated,
all with the same username as the initial connection if performing
authentication, regardless of the authentication information provided
by the user and whether it was defined on the AAA server, and
regardless of whether the password was correct.

This vulnerability is caused by a race condition in the code, and
several conditions outside the control of a malicious user and must
be met before this vulnerability could be exploited.

For further information on Authentication Proxy for HTTP see the
Cisco IOS Security Configuration Guide, Release 12.4 "Configuring
Authentication Proxy" at the following link:

http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_cfg_authen_prxy_external_docbase_0900e4b1805afd05_4container_external_docbase_0900e4b1807b01d5.html

For further information on Authentication Proxy for HTTPS see the
Cisco IOS Security Configuration Guide, Release 12.4 "Firewall
Support of HTTPS Authentication Proxy" at the following link:

http://www.cisco.com/en/US/docs/ios/security/configuration/guide/sec_fwall_https_prxy_external_docbase_0900e4b1805afe18_4container_external_docbase_0900e4b1807b01d5.html

For further information on the consent feature see the Cisco IOS
Security Configuration Guide, Securing User Services, Release 12.2SR
"Consent Feature for Cisco IOS Routers" at the following link:

http://www.cisco.com/en/US/docs/ios/sec_user_services/configuration/guide/sec_cons_feat_rtrs_ps6922_TSD_Products_Configuration_Guide_Chapter.html

For further information on the Web Authentication feature see the
Catalyst 3750 Switch Software Configuration Guide, Release 12.2(50)SE
"Configuring IEEE 802.1x Port-Based Authentication" at the following
link:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/configuration/guide/sw8021x.html#wp1401291

This vulnerability is documented in the following Cisco Bug ID: 
CSCsy15227 and has been assigned the Common Vulnerabilities and Exposures
(CVE) identifier CVE-2009-2863.

Vulnerability Scoring Details
=============================

Cisco has provided scores for the vulnerability in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.

CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.

Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.

Cisco has provided an FAQ to answer additional questions regarding
CVSS at:

http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html

Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:

http://intellishield.cisco.com/security/alertmanager/cvss

CSCsy15227 - Cisco IOS Software Authentication Proxy Vulnerability

CVSS Base Score - 7.1

Access Vector           - Network
Access Complexity       - Medium
Authentication          - None
Confidentiality Impact  - Complete
Integrity Impact        - None
Availability Impact     - None

CVSS Temporal Score - 5.9

Exploitability          - Functional
Remediation Level       - Official-Fix
Report Confidence       - Confirmed


Impact
======

Successful exploitation of the vulnerability may result in an
unauthenticated and unauthorized user bypassing the authentication
proxy services offered in Cisco IOS Authentication Proxy for HTTP(S)
and/or bypassing the consent accept webpage.

Software Versions and Fixes
===========================

When considering software upgrades, also consult:

http://www.cisco.com/go/psirt

and any subsequent advisories to determine exposure and a complete
upgrade solution.

In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.

Each row of the Cisco IOS Software table (below) names a Cisco IOS
release train. If a given release train is vulnerable, then the
earliest possible releases that contain the fix (along with the
anticipated date of availability for each, if applicable) are listed
in the "First Fixed Release" column of the table. The "Recommended
Release" column indicates the releases which have fixes for all the
published vulnerability at the time of this Advisory. A device
running a release in the given train that is earlier than the release
in a specific column (less than the First Fixed Release) is known to
be vulnerable. Cisco recommends upgrading to a release equal to or
later than the release in the "Recommended Releases" column of the
table.

+-------------------------------------------------------------------+
|   Major    |          Availability of Repaired Releases           |
|  Release   |                                                      |
|------------+------------------------------------------------------|
|  Affected  |                                      |  Recommended  |
| 12.0-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
| 12.0       | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0DA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.0(4) |               |
|            | DB are not vulnerable.               | 12.4(23b)     |
| 12.0DB     |                                      |               |
|            | Releases 12.0(7)DB and later are not | 12.4(25b)     |
|            | vulnerable; first fixed in 12.4      |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.0(3) |               |
|            | DC1 are not vulnerable.              | 12.4(23b)     |
| 12.0DC     |                                      |               |
|            | Releases 12.0(7)DC and later are not | 12.4(25b)     |
|            | vulnerable; first fixed in 12.4      |               |
|------------+--------------------------------------+---------------|
| 12.0S      | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SP     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0ST     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0SZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.0T      |                                      |               |
|            | Releases up to and including 12.0(4) | 12.4(25b)     |
|            | T1 are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.0W      | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.0(5)WC4 are     |               |
| 12.0WC     | vulnerable, release 12.0(5)WC4 and   |               |
|            | later are not vulnerable             |               |
|------------+--------------------------------------+---------------|
| 12.0WT     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XD     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.0XE     |                                      |               |
|            | Releases up to and including 12.0(5) | 12.4(25b)     |
|            | XE are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.0XF     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XG     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XH     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XI     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XJ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.0XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.0XL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XM     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XN     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XQ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.0XR     |                                      |               |
|            | Releases up to and including 12.0(6) | 12.4(25b)     |
|            | XR are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.0XS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XT     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.0XV     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.1-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1AA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1AX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1    | 12.2(50)SE3   |
|            | (13)AY are not vulnerable.           |               |
| 12.1AY     |                                      | 12.2(52)SE;   |
|            | Releases 12.1(22)AY1 and later are   | Available on  |
|            | not vulnerable; first fixed in       | 13-OCT-2009   |
|            | 12.2SE                               |               |
|------------+--------------------------------------+---------------|
| 12.1AZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1CX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1DA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1(3) |               |
|            | DB1 are not vulnerable.              | 12.4(23b)     |
| 12.1DB     |                                      |               |
|            | Releases 12.1(4)DB1 and later are    | 12.4(25b)     |
|            | not vulnerable; first fixed in 12.4  |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1(4) |               |
|            | DC are not vulnerable.               | 12.4(23b)     |
| 12.1DC     |                                      |               |
|            | Releases 12.1(4)DC2 and later are    | 12.4(25b)     |
|            | not vulnerable; first fixed in 12.4  |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.1E      | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.1(6) |               |
|            | EA1a are not vulnerable.             | 12.2(50)SE3;  |
| 12.1EA     |                                      | Available on  |
|            | Releases 12.1(8)EA1c and later are   | 13-OCT-2009   |
|            | not vulnerable; first fixed in       |               |
|            | 12.2SE                               |               |
|------------+--------------------------------------+---------------|
| 12.1EB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EO     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EV     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.1EX     |                                      |               |
|            | Releases up to and including 12.1(2) | 12.4(25b)     |
|            | EX are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.1EY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1EZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1GA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1GB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1XA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XC     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1XD     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XE     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XF     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XG     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XI     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XJ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.1(3a)XL2 are    | 12.4(23b)     |
| 12.1XL     | vulnerable, release 12.1(3a)XL2 and  |               |
|            | later are not vulnerable; first      | 12.4(25b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XP     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1XQ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1XR     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1XS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.1XT     |                                      |               |
|            | Releases up to and including 12.1(2) | 12.4(25b)     |
|            | XT2 are not vulnerable.              |               |
|------------+--------------------------------------+---------------|
| 12.1XU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XV     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1XZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.1YA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.1YB     |                                      |               |
|            | Releases up to and including 12.1(5) | 12.4(25b)     |
|            | YB are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.1YC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1YD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.1(5)YE6 are     | 12.4(23b)     |
| 12.1YE     | vulnerable, release 12.1(5)YE6 and   |               |
|            | later are not vulnerable; first      | 12.4(25b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.1YF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.1YH     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.1YI     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.1YJ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.2-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.2B      |                                      |               |
|            | Releases up to and including 12.2(2) | 12.4(25b)     |
|            | B7 are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
| 12.2BC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2BW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2BX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2BY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2BZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2CX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2CY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; migrate to any release   | 12.2(31)SB16  |
| 12.2CZ     | in 12.2SB                            |               |
|            |                                      | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
| 12.2DA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2DD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2DX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2EW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2EWA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.2SE    | 12.2(50)SE3   |
|            |                                      |               |
| 12.2EX     | Releases up to and including 12.2    | 12.2(52)SE;   |
|            | (37)EX are not vulnerable.           | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.2SE    | 12.2(50)SE3   |
|            |                                      |               |
| 12.2EY     | Releases up to and including 12.2    | 12.2(52)SE;   |
|            | (25)EY4 are not vulnerable.          | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2EZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2FX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2FY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2FZ     | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2IRA    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2IRB    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IRC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXB    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXD    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXE    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXF    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXG    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2IXH    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2JA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2JK     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2MB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2MC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Note: Releases prior to 12.2(30)S    | 12.2(31)SB16  |
| 12.2S      | are vulnerable, release 12.2(30)S    |               |
|            | and later are not vulnerable;        | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
| 12.2SB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Note: Releases prior to 12.2(27)SBC3 | 12.2(31)SB16  |
| 12.2SBC    | are vulnerable, release 12.2(27)SBC3 |               |
|            | and later are not vulnerable;        | 12.2(33)SB7   |
|------------+--------------------------------------+---------------|
| 12.2SCA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SCB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            | 12.2(50)SE3                          |               |
| 12.2SE     |                                      | 12.2(52)SE;   |
|            | 12.2(52)SE; Available on 13-OCT-2009 | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2SEA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SEB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEC    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SED    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(50)SE3   |
|            |                                      |               |
| 12.2SEE    | Vulnerable; first fixed in 12.2SE    | 12.2(52)SE;   |
|            |                                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(25)SEF2 are   | 12.2(50)SE3   |
|            | vulnerable, release 12.2(25)SEF2 and |               |
| 12.2SEF    | later are not vulnerable; first      | 12.2(52)SE;   |
|            | fixed in 12.2SE                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(25)SEG4 are   | 12.2(50)SE3   |
|            | vulnerable, release 12.2(25)SEG4 and |               |
| 12.2SEG    | later are not vulnerable; first      | 12.2(52)SE;   |
|            | fixed in 12.2SE                      | Available on  |
|            |                                      | 13-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | 12.2(50)SG4                          |               |
| 12.2SG     |                                      | 12.2(50)SG4   |
|            | 12.2(53)SG1; Available on            |               |
|            | 07-DEC-2009                          |               |
|------------+--------------------------------------+---------------|
| 12.2SGA    | 12.2(31)SGA11                        | 12.2(31)SGA11 |
|------------+--------------------------------------+---------------|
| 12.2SL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SM     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SO     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SQ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2SRA    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2SRB    | Vulnerable; first fixed in 12.2SRD   | 12.2(33)SRD3  |
|------------+--------------------------------------+---------------|
| 12.2SRC    | 12.2(33)SRC5; Available on           | 12.2(33)SRD3  |
|            | 29-OCT-2009                          |               |
|------------+--------------------------------------+---------------|
|            | 12.2(33)SRD2a                        |               |
| 12.2SRD    |                                      | 12.2(33)SRD3  |
|            | 12.2(33)SRD3                         |               |
|------------+--------------------------------------+---------------|
| 12.2STE    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2SU     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2SV     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SVA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SVC    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SVD    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SVE    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SX     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SXA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SXB    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SXD    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2SXE    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | 12.2(18)SXF17; Available on          | 12.2(18)      |
|            | 30-SEP-2009                          | SXF17;        |
| 12.2SXF    |                                      | Available on  |
|            | Please see IOS Software Modularity   | 30-SEP-2009   |
|            | Patch                                |               |
|------------+--------------------------------------+---------------|
|            | 12.2(33)SXH6; Available on           |               |
|            | 30-OCT-2009                          | 12.2(33)SXH6; |
| 12.2SXH    |                                      | Available on  |
|            | Please see IOS Software Modularity   | 30-OCT-2009   |
|            | Patch                                |               |
|------------+--------------------------------------+---------------|
|            | 12.2(33)SXI2                         |               |
| 12.2SXI    |                                      | 12.2(33)SXI2a |
|            | 12.2(33)SXI2a                        |               |
|------------+--------------------------------------+---------------|
| 12.2SY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2SZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2TPC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.2XA     |                                      |               |
|            | Releases up to and including 12.2(1) | 12.4(25b)     |
|            | XA are not vulnerable.               |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; first fixed in 12.4      | 12.4(23b)     |
| 12.2XB     |                                      |               |
|            | Releases up to and including 12.2(2) | 12.4(25b)     |
|            | XB1 are not vulnerable.              |               |
|------------+--------------------------------------+---------------|
| 12.2XC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2XE     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XF     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XH     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2XI     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XJ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XL     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2XNA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XNB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XNC    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XND    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(31)SGA11 |
| 12.2XO     | Vulnerable; first fixed in 12.2SG    |               |
|            |                                      | 12.2(50)SG4   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2XR     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2XS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XT     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.2XU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XV     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2XW     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(4)YA8 are     | 12.4(23b)     |
| 12.2YA     | vulnerable, release 12.2(4)YA8 and   |               |
|            | later are not vulnerable; first      | 12.4(25b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YB     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YC     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YD     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YE     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YF     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YG     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YH     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YJ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YK     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2YM     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YN     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YO     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YP     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YQ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YR     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YS     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2YT     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YU     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(11)YV1 are    |               |
| 12.2YV     | vulnerable, release 12.2(11)YV1 and  |               |
|            | later are not vulnerable             |               |
|------------+--------------------------------------+---------------|
| 12.2YW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YX     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2YY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2YZ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2ZA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2ZB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.2ZC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZD     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2ZE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2ZF     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.2ZG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.2(13)ZH6 are    | 12.4(23b)     |
| 12.2ZH     | vulnerable, release 12.2(13)ZH6 and  |               |
|            | later are not vulnerable; first      | 12.4(25b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZJ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZL     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
| 12.2ZP     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.2(33)SXH6; |
| 12.2ZU     | Vulnerable; first fixed in 12.2SXH   | Available on  |
|            |                                      | 30-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.2ZX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZY     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.2ZYA    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.3-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3       | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3B      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.3BC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3BW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3EU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3JA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3JEA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3JEB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3JEC    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases up to and including 12.3(2) |               |
|            | JK3 are not vulnerable.              | 12.4(23b)     |
| 12.3JK     |                                      |               |
|            | Releases 12.3(8)JK1 and later are    | 12.4(25b)     |
|            | not vulnerable; first fixed in 12.4  |               |
|------------+--------------------------------------+---------------|
| 12.3JL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3JX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3T      | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3TPC    | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3VA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.3XB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.3(2)XC4 are     | 12.4(23b)     |
| 12.3XC     | vulnerable, release 12.3(2)XC4 and   |               |
|            | later are not vulnerable; first      | 12.4(25b)     |
|            | fixed in 12.4                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XD     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XE     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3XF     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XG     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.3XI     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3XJ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XK     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
|            |                                      | 12.4(22)T3    |
| 12.3XL     | Vulnerable; first fixed in 12.4T     |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XQ     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XR     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XS     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.3XU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3XW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3XX     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.3XY     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3XZ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(23b)     |
| 12.3YA     | Vulnerable; first fixed in 12.4      |               |
|            |                                      | 12.4(25b)     |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YD     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.3YF     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YG     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YH     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YI     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.3YJ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YK     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YM     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.3YQ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YS     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3YT     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.3YU     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.3YX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.3YZ     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.3ZA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|  Affected  |                                      |  Recommended  |
| 12.4-Based |         First Fixed Release          |    Release    |
|  Releases  |                                      |               |
|------------+--------------------------------------+---------------|
|            | 12.4(23a)                            | 12.4(23b)     |
| 12.4       |                                      |               |
|            | 12.4(25a)                            | 12.4(25b)     |
|------------+--------------------------------------+---------------|
| 12.4GC     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JA     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JDA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JDC    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JDD    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JK     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JMA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JMB    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4JX     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4MD     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4MDA    | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            | Releases prior to 12.4(19)MR1 are    |               |
| 12.4MR     | vulnerable, release 12.4(19)MR1 and  |               |
|            | later are not vulnerable             |               |
|------------+--------------------------------------+---------------|
| 12.4SW     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            | 12.4(24)T1                           |               |
|            |                                      | 12.4(20)T4    |
|            | 12.4(20)T3                           |               |
| 12.4T      |                                      | 12.4(22)T3    |
|            | 12.4(22)T2                           |               |
|            |                                      | 12.4(24)T2;   |
|            | 12.4(15)T9                           | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.4XB     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XC     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XD     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XE     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XF     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.4XG     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XJ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XK     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.4XL     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4XM     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4XN     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4XP     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4XQ     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4XR     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XT     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            | Vulnerable; Contact your support     |               |
| 12.4XV     | organization per the instructions in |               |
|            | Obtaining Fixed Software section of  |               |
|            | this advisory                        |               |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XW     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XY     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4XZ     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
|            |                                      | 12.4(15)T10   |
|            |                                      |               |
|            |                                      | 12.4(20)T4    |
|            |                                      |               |
| 12.4YA     | Vulnerable; first fixed in 12.4T     | 12.4(22)T3    |
|            |                                      |               |
|            |                                      | 12.4(24)T2;   |
|            |                                      | Available on  |
|            |                                      | 23-OCT-2009   |
|------------+--------------------------------------+---------------|
| 12.4YB     | 12.4(22)YB4                          | 12.4(22)YB4   |
|------------+--------------------------------------+---------------|
| 12.4YD     | Not Vulnerable                       |               |
|------------+--------------------------------------+---------------|
| 12.4YE     | Not Vulnerable                       |               |
+-------------------------------------------------------------------+

Cisco IOS Software Modularity - Maintenance Packs
+------------------------------------------------

Customers who are using Cisco IOS Software Modularity can apply the
respective maintenance packs. More information on Cisco IOS Software
Modularity can be found at the following link:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps708/prod_bulletin0900aecd80313e15.html

The Maintenance Packs listed below can be downloaded at:

http://www.cisco.com/go/pn

Cisco IOS Software Modularity Maintenance Pack for 12.2SXF
+---------------------------------------------------------

+-------------------------------------------------------------------+
|  Cisco IOS Software Release   |   Solution Maintenance Pack(MP)   |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF11                 | MP002                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF13                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF14                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF15                 | MP001                             |
|-------------------------------+-----------------------------------|
| 12.2(18)SXF16                 | MP001                             |
+-------------------------------------------------------------------+

Cisco IOS Software Modularity Maintenance Pack for 12.2SXH
+---------------------------------------------------------

+-------------------------------------------------------------------+
|  Cisco IOS Software Release   |   Solution Maintenance Pack(MP)   |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH3                  | MP003                             |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH4                  | MP002                             |
|-------------------------------+-----------------------------------|
| 12.2(33)SXH5                  | MP001                             |
+-------------------------------------------------------------------+

Workarounds
===========

There are no workarounds for this vulnerability.

Obtaining Fixed Software
========================

Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.

Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at:

http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html

or as otherwise set forth at Cisco.com Downloads at:

http://www.cisco.com/public/sw-center/sw-usingswc.shtml

Do not contact psirt@cisco.com or security-alert@cisco.com for
software upgrades.

Customers with Service Contracts
+-------------------------------

Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.

Customers using Third Party Support Organizations
+------------------------------------------------

Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.

The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.

Customers without Service Contracts
+----------------------------------

Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.

  * +1 800 553 2447 (toll free from within North America)
  * +1 408 526 7209 (toll call from anywhere in the world)
  * e-mail: tac@cisco.com

Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.

Refer to:

http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.

Exploitation and Public Announcements
=====================================

The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerability described in this advisory.

This vulnerability was discovered by Cisco during internal testing.
The Cisco PSIRT is not aware of malicious exploitation of this
vulnerability, although we are aware of some customers who have seen
this vulnerability triggered within their infrastructures.

Status of this Notice: FINAL
============================

THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.

A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.

Distribution
============

This advisory is posted on Cisco's worldwide website at:

http://www.cisco.com/warp/public/707/cisco-sa-20090923-auth-proxy.shtml

In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.

  * cust-security-announce@cisco.com
  * first-bulletins@lists.first.org
  * bugtraq@securityfocus.com
  * vulnwatch@vulnwatch.org
  * cisco@spot.colorado.edu
  * cisco-nsp@puck.nether.net
  * full-disclosure@lists.grok.org.uk
  * comp.dcom.sys.cisco@newsgate.cisco.com

Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.

Revision History
================

+----------------------------------------+
| Revision |                   | Initial |
| 1.0      | 2009-September-23 | public  |
|          |                   | release |
+----------------------------------------+

Cisco Security Procedures
=========================

Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at:

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