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             AUSCERT External Security Bulletin Redistribution

        Cross-Site Scripting Vulnerability in Citrix Web Interface
                               16 July 2009


        AusCERT Security Bulletin Summary

Product:           Web Interface 4.6 for Presentation Server
                   Web Interface 5.0
Publisher:         Citrix
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands 
                    -- Remote with User Interaction
                   Access Privileged Data          
                    -- Remote with User Interaction
                   Cross-site Scripting            
                    -- Remote with User Interaction
Resolution:        Patch
CVE Names:         CVE-2009-2454  

Original Bulletin: 

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Cross-Site Scripting Vulnerability in Citrix Web Interface

Document ID: CTX120697 / Created On: Apr 21, 2009 / Updated On: Apr 28, 2009
Average Rating: not yet rated

Severity: Medium

Description of Problem

A cross-site scripting vulnerability has been identified in specific 
versions of Citrix Web Interface.

This vulnerability could potentially be used to execute malicious 
client-side script in the same context as legitimate content from the web 
server; 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 affects Citrix Web Interface versions 4.6, 5.0 and 5.0.1 

What Customers Should Do

This vulnerability has been addressed in Citrix Web Interface version 5.1.0 
and above. Citrix recommends that both XenApp and XenDesktop customers 
upgrade their Web Interface to version 5.1.0 and above.

The latest version of Web Interface can be obtained from the Downloads 
location of the Citrix website and the location below:



Citrix would like to thank Dave of Subverted.org for working with us to 
protect Citrix customers.

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:

    * Web Interface 4.6 for Presentation Server
    * Web Interface 5.0

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