Vulnerability in Citrix Presentation Server Client for Windows could result in arbitrary code execution

Severity: High

Description of Problem

The Citrix Presentation Server Client provides an ActiveX component that can be used to integrate the client into Web pages. An implementation flaw in this component may allow a specially crafted Web page to execute arbitrary code in the context of the host process.

This vulnerability is present in all versions of the Citrix Presentation Server Client for Windows earlier than 9.230.

What Customers Should Do

This vulnerability has been addressed in the Citrix Presentation Server Client for Windows version 9.230 and later. Citrix strongly recommends that customers upgrade their Citrix Presentation Server Client for Windows to version 9.230 and later. These upgrades can be obtained from the following location:

http://www.citrix.com/English/SS/downloads/downloads.asp?dID=2755

Acknowledgements

Citrix thanks the following for working with us to protect Citrix customers:

• Andrew Christensen of FortConsult

• Aaron Portnoy of the TippingPoint Security Research Team

What Citrix Is Doing

Citrix is proactively 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.