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                                    CERT-Renater

                         Note d'Information No. 2007/VULN534
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DATE                      : 20/12/2007

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Citrix NFuse, Citrix Web
                                                        Interface.

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http://support.citrix.com/article/CTX115283
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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
information.

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:

http://www.citrix.com/English/SS/downloads/downloads.asp?dID=36407

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

Acknowledgements
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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