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

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 user’s 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.