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31 December 2007

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             AUSCERT External Security Bulletin Redistribution

                          ESB-2007.1041 -- [Win]
         Cross-site scripting vulnerability in legacy versions of
                           Citrix Web Interface
                             31 December 2007


        AusCERT Security Bulletin Summary

Product:              Citrix Web Interface 2.0 and below
                      Citrix NFuse
Publisher:            Citrix
Operating System:     Windows
Impact:               Cross-site Scripting
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-6477

Original Bulletin:    http://support.citrix.com/article/CTX115283

Revision History:     December 31 2007: Added CVE
                      December 20 2007: Initial Release

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Cross-site scripting vulnerability in legacy versions of Citrix Web Interface

Document ID: CTX115283
Created On: 18-Dec-2007
Updated On: 18-Dec-2007
Severity: Medium

Description of Problem

A cross-site scripting vulnerability has been identified in the on-line
help of legacy 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

The following Citrix products are affected by this vulnerability:

       Citrix NFuse (all versions)

       Citrix Web Interface up to and including 2.0

Mitigating Factors

In order for this vulnerability to be exploited a user would have to visit
to a URL that had been constructed by an attacker. This would typically
involve either visiting a web page owned by the attacker or clicking on a
URL in an email from the attacker.

What Customers Should Do

This vulnerability has been addressed in current versions of Web Interface.
Citrix recommends that customers using affected versions of Web Interface
upgrade to the latest version. The latest version of Web Interface can be
found at the following location:


Please note that all affected product versions have already reached End of


Citrix thanks David Vaartjes of ITsec Security Services B.V 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
Base at http://support.citrix.com/.

Obtaining Support on this Issue

If you require technical assistance with this issue, please contact Citrix
Technical Support. Information for contacting Citrix Technical Support is
available at http://support.citrix.com/.

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers
any and all potential vulnerabilities very seriously. If you would like to
report a security issue to Citrix, please compose an e-mail to
secure@citrix.com containing 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 2.0

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