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Category:   Device (Router/Bridge/Hub)  >   Cisco IOS Vendors:   Cisco
Cisco IOS NAT Bugs Let Remote Users Deny Service
SecurityTracker Alert ID:  1027579
SecurityTracker URL:  http://securitytracker.com/id/1027579
CVE Reference:   CVE-2012-4618, CVE-2012-4619   (Links to External Site)
Date:  Sep 26 2012
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in Cisco IOS. A remote user can cause denial of service conditions.

A remote user can send specially crafted SIP packets to trigger a flaw in the NAT SIP application layer gateway (ALG) feature and cause the target device to reload [CVE-2012-4618].

Cisco has assigned Cisco bug ID CSCtn76183 to this vulnerability.

A remote user can send specially crafted IP packets to cause the target device to reload [CVE-2012-4619].

Cisco has assigned Cisco bug ID CSCtr46123 to this vulnerability.

Impact:   A remote user can cause the target device to reload.
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://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-nat

Vendor URL:  tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-nat (Links to External Site)
Cause:   State error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Wed, 26 Sep 2012 12:18:34 -0400
Subject:  Cisco Security Advisory: Cisco IOS Software Network Address Translation Vulnerabilities

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Cisco IOS Software Network Address Translation Vulnerabilities

Advisory ID: cisco-sa-20120926-nat

Revision 1.0

For Public Release 2012 September 26 16:00  UTC (GMT)
+---------------------------------------------------------------------

Summary
=======

The Cisco IOS Software Network Address Translation (NAT) feature
contains two denial of service (DoS) vulnerabilities in the
translation of IP packets.

The vulnerabilities are caused when packets in transit on the
vulnerable device require translation.

Cisco has released free software updates that address these
vulnerabilities.  This advisory is available at the following link:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120926-nat

Note: The September 26, 2012, Cisco IOS Software Security Advisory
bundled publication includes 9 Cisco Security Advisories. Eight of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each Cisco IOS Software Security Advisory lists the Cisco IOS
Software releases that correct the vulnerability or vulnerabilities
detailed in the advisory as well as the Cisco IOS Software releases
that correct all Cisco IOS Software vulnerabilities in the September
2012 bundled publication.

Individual publication links are in "Cisco Event Response: Semi-Annual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:

http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep12.html

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