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             AUSCERT External Security Bulletin Redistribution

                          ESB-2009.0316 -- [Win]
         Citrix Presentation Server: Credential Handling Weakness
                               3 April 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Citrix Presentation Server
Publisher:            Citrix
Operating System:     Windows
Impact:               Access Privileged Data
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-6561

Original Bulletin:    http://support.citrix.com/article/CTX116227

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Credential Handling Weakness in Presentation Server Client for Windows
Document ID: CTX116227 Created On: Mar 10, 2008 / Updated On: Mar 10, 2008

Severity: Low

Description of Problem

Under some circumstances, the Citrix Presentation Server Client for Windows 
may leave residual credential information in the client process memory.

This issue is present in all versions of the Citrix Presentation Server 
Client for Windows prior to version 10.200.

Mitigating Factors

In order to exploit this weakness, an attacker would need to read the client 
process memory; under normal circumstances this would not be possible unless 
the client host had already been compromised.

What Customers Should Do

In most deployments, this weakness does not present a significant security 
risk. However, customers that are concerned about this may wish to consider 
upgrading to the latest version of the Presentation Server Client for 
Windows.

This client package can be obtained from the following locations:

Citrix Presentation Server Client Package Windows

EN - http://support.citrix.com/article/CTX116550
FR - http://support.citrix.com/article/CTX116552
GE - http://support.citrix.com/article/CTX116551
JA - http://support.citrix.com/article/CTX116554
ES - http://support.citrix.com/article/CTX116553

Acknowledgements

Citrix thanks Olivier Revenu of EdelWeb (http://www.edelweb.fr) 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:

    * XenApp Plug-in for Windows (32/64 Bit)

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