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Category:   Application (Generic)  >   CA SiteMinder Vendors:   CA
CA SiteMinder Input Validation Flaw Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1029237
SecurityTracker URL:  http://securitytracker.com/id/1029237
CVE Reference:   CVE-2013-5968   (Links to External Site)
Date:  Oct 24 2013
Impact:   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): 12.0, 12.5, 12.51
Description:   A vulnerability was reported in CA SiteMinder. A remote user can conduct cross-site scripting attacks.

The software may not properly filter HTML code from user-supplied input before displaying the input. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the CA SiteMinder 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.

Zachary Pritchard, Cigital, reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the CA SiteMinder 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 described configuration instructions in their advisory to correct this vulnerability.

The vendor's advisory is available at:

https://support.ca.com/irj/portal/anonymous/phpsupcontent?contentID={9B8E7A8A-2A00-4456-A7CC-8C2E74AA7EA5}

Vendor URL:  support.ca.com/irj/portal/anonymous/phpsupcontent?contentID={9B8E7A8A-2A00-4456-A7CC-8C2E74AA7EA5} (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (NT), Windows (2000), Windows (2003)

Message History:   None.


 Source Message Contents

Subject:  [Full-disclosure] CA20131024-01: Security Notice for CA SiteMinder

-----BEGIN PGP SIGNED MESSAGE-----

CA20131024-01: Security Notice for CA SiteMinder

Issued: October 24, 2013

CA Technologies Support is alerting customers to a potential
vulnerability in CA SiteMinder that can be mitigated by utilizing
existing product functionality. The vulnerability, CVE-2013-5968, can
potentially allow a remote attacker to conduct a cross-site scripting
attack and execute script in the security context of the SiteMinder
domain. Customers should review their SiteMinder deployments to
verify that the vulnerability mitigating functionality is enabled.

Risk Rating

Medium

Platform

All platforms

Affected Products

CA SiteMinder 12.51
CA SiteMinder 12.5
CA SiteMinder 12.0
CA SiteMinder 6 Web Agents

How to determine if the installation is affected

Ensure cross-site scripting checking is enabled and the BadCSSChars
setting contains the hexadecimal double quote, "%22". See the solution
section for details.

Solution

CA Technologies support is referring customers to guidance provided in
the product documentation that describes how to protect against this
vulnerability.

These instructions are derived from the CA SiteMinder Web Agent
Configuration Guide 12.5. Review the sections titled "Protect Web
Sites Against Cross-Site Scripting" and "Configure the Web Agent to
Check For Cross Site-Scripting" starting on page 65 for more
information.

1. Add the hexadecimal equivalent for the double quote character,
"%22", to the BadCSSChars setting.

Example:

BadCSSChars="<,>,%22"

*Note: Setting BadCSSChars overrides the default cross-site scripting
character set. SiteMinder administrators need to carefully review the
setting to ensure all cross-site scripting characters are blocked for
their specific environment.

2. Enable cross-site scripting checking by setting CSSChecking to yes.

Example:

CSSChecking="YES"

References

CVE-2013-5968 - SiteMinder CSS

CA20131024-01: Security Notice for CA SiteMinder
https://support.ca.com/irj/portal/anonymous/phpsbpldgpg

Acknowledgement

CVE-2013-5968 - Zachary Pritchard, Cigital

Change History

Version 1.0: Initial Release

If additional information is required, please contact CA Technologies
Support at http://support.ca.com/

If you discover a vulnerability in CA Technologies products, please
report your findings to the CA Technologies Product Vulnerability
Response Team:
https://support.ca.com/irj/portal/anonymous/phpsbpldgpg

Regards,

Kevin Kotas
Director, CA Technologies Product Vulnerability Response Team

Copyright (c) 2013 CA. All Rights Reserved. One CA Plaza, Islandia,
N.Y. 11749. All other trademarks, trade names, service marks, and
logos referenced herein belong to their respective companies.

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