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             AUSCERT External Security Bulletin Redistribution

        Cross Site Scripting vulnerability in Citrix Access Gateway
                      Enterprise Edition Logon Portal
                              25 August 2011


        AusCERT Security Bulletin Summary

Product:           Citrix Access Gateway Enterprise Edition
Publisher:         Citrix
Operating System:  Windows
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade

Original Bulletin: 

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Cross Site Scripting vulnerability in Citrix Access Gateway Enterprise Edition 
Logon Portal

Document ID: CTX129971  
Created On: 23-Aug-2011     
Updated On: 23-Aug-2011
Average Rating: 5 (2 ratings)

Severity: Medium

Description of Problem

A cross-site scripting vulnerability has been discovered in the logon portal
of Citrix Access Gateway Enterprise Edition.

This vulnerability could potentially be used to execute malicious client-side 
script in the same context as the Access Gateway Enterprise Edition. If this 
vulnerability is used to execute script in the browser of an authenticated 
user then the script may be able to gain access to the authenticated users 
session, or other potentially sensitive information.

This vulnerability is present in all versions of Citrix Access Gateway 
Enterprise Edition up to and including version 9.2-49.8.

What Customers Should Do

This vulnerability has been addressed in version 9.2-50.4 of the Access 
Gateway Enterprise Edition software and later. Citrix Access Gateway 
Enterprise Edition version 9.3 is not affected by this vulnerability.

Citrix recommends that customers upgrade their Access Gateway Enterprise 
Edition software to this version. Customers using earlier versions of the 
Access Gateway software are advised to upgrade their Access Gateway software 
to a version that contains the fix for this issue.

The Access Gateway Enterprise Edition software can be found at the following 


Customers using the Access Gateway Enterprise Edition version 9.1 in the Common 
Criteria evaluated configuration should apply the Common Criteria specific 
version of the 9.1 firmware (9.1-100.8) from the following location:


What Citrix Is Doing

Citrix is notifying customers and channel partners about this potential 
security issue. This article is also available from the Citrix Knowledge 
Center at http://support.citrix.com/.

Obtaining Support on This Issue

If you require technical assistance with this issue, please contact Citrix 
Technical Support. Contact details for Citrix Technical Support are available 
at http://www.citrix.com/site/ss/supportContacts.asp.

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any 
and all potential vulnerabilities seriously. If you would like to report a 
security issue to Citrix, please compose an e-mail to secure@citrix.com stating 
the exact version of the product in which the vulnerability was found and the 
steps needed to reproduce the vulnerability.

This document applies to:

    * Access Gateway 8.0 Enterprise Edition
    * Access Gateway 8.1 Enterprise Edition
    * Access Gateway 9.0 Enterprise Edition
    * Access Gateway 9.1 Enterprise Edition
    * Access Gateway 9.2 Enterprise Edition
    * Access Gateway 9.3 Enterprise Edition

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