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Category:   Application (Security)  >   Red Hat Certificate Server Vendors:   Red Hat
Red Hat Certificate System Flaws Permit Cross-Site Scripting and Denial of Service Attacks
SecurityTracker Alert ID:  1027846
SecurityTracker URL:  http://securitytracker.com/id/1027846
CVE Reference:   CVE-2012-4543, CVE-2012-4555, CVE-2012-4556   (Links to External Site)
Date:  Dec 6 2012
Impact:   Denial of service via network, Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8
Description:   Several vulnerabilities were reported in Red Hat Certificate System. A remote authenticated user can cause denial of service conditions. A remote user can conduct cross-site scripting attacks.

A remote authenticated user can send specially crafted data to cause the Apache httpd web server child process to crash, which may interrupt the processing of other users' requests [CVE-2012-4555, CVE-2012-4556].

Patrick Raspante and Ryan Millay of GDC4S reported theses vulnerabilities.

Several scripts do not properly filter HTML code from user-supplied input before displaying the input [CVE-2012-4543]. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Red Hat Certificate System software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Impact:   A remote authenticated user can cause denial of service conditions on the target system.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Red Hat Certificate System software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Solution:   The vendor has issued a fix.

The vendor's advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-1550.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2012-1550.html (Links to External Site)
Cause:   Input validation error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   None.


 Source Message Contents

Date:  Thu, 6 Dec 2012 20:38:09 +0000
Subject:  [RHSA-2012:1550-01] Moderate: pki security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: pki security update
Advisory ID:       RHSA-2012:1550-01
Product:           Red Hat Certificate System
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1550.html
Issue date:        2012-12-06
CVE Names:         CVE-2012-4543 CVE-2012-4555 CVE-2012-4556 
=====================================================================

1. Summary:

Updated pki-common and pki-tps packages that fix multiple security issues
are now available for Red Hat Certificate System 8.1.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Certificate System 8 - i386, noarch, x86_64

3. Description:

Red Hat Certificate System (RHCS) is an enterprise software system designed
to manage enterprise Public Key Infrastructure (PKI) deployments.

Multiple cross-site scripting flaws were discovered in the Red Hat
Certificate System. An attacker could use these flaws to perform a
cross-site scripting (XSS) attack against victims using Certificate
System's web interface. (CVE-2012-4543)

Multiple denial of service flaws were found in the Red Hat Certificate
System token processing. A Certificate System user could use these flaws
to crash the Apache httpd web server child process, possibly interrupting
the processing of other users' requests. (CVE-2012-4555, CVE-2012-4556)

Red Hat would like to thank Patrick Raspante and Ryan Millay of GDC4S for
reporting the CVE-2012-4555 and CVE-2012-4556 issues.

All users of Red Hat Certificate System are advised to upgrade to these
updated packages, which correct these issues. After installing this update,
all Red Hat Certificate System subsystems must be restarted ("/etc/init.d
/[instance-name] restart") for the update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

864397 - CVE-2012-4543 Certificate System: Multiple cross-site scripting flaws by displaying CRL or processing profile
869570 - CVE-2012-4555 pki-tps: Temporary denial of service on interrupted token format operations
869579 - CVE-2012-4556 pki-tps: Connection reset when performing empty certificate search in TPS

6. Package List:

Red Hat Certificate System 8:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHCERT/SRPMS/pki-common-8.1.3-2.el5pki.src.rpm
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHCERT/SRPMS/pki-tps-8.1.3-2.el5pki.src.rpm

i386:
pki-tps-8.1.3-2.el5pki.i386.rpm

noarch:
pki-common-8.1.3-2.el5pki.noarch.rpm
pki-common-javadoc-8.1.3-2.el5pki.noarch.rpm

x86_64:
pki-tps-8.1.3-2.el5pki.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-4543.html
https://www.redhat.com/security/data/cve/CVE-2012-4555.html
https://www.redhat.com/security/data/cve/CVE-2012-4556.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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