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                                   CERT-Renater

                        Note d'Information No. 2009/VULN248
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DATE                      : 22/06/2009

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Citrix Secure Gateway.

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http://support.citrix.com/article/CTX121172
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Vulnerability in Citrix Secure Gateway could result in Denial of Service
Document ID: CTX121172 / Created On: Jun 15, 2009 / Updated On: Jun 15, 2009

Severity: Medium

Description of Problem

A vulnerability has been identified in Citrix Secure Gateway that could
result in a denial of service.

When a specific request is made to the Secure Gateway service from a remote
attacker, the Secure Gateway service can be made to consume 100% of the
available CPU and may refuse further connections.

This vulnerability is present in all versions of Citrix Secure Gateway up
to and including version 3.1.

Please note that the Citrix Access Gateway appliance is not affected by
this vulnerability when configured to act as a Citrix Secure Gateway.

What Customers Should Do

A hotfix has been released to address this issue. Citrix recommends that
customers using Secure Gateway install this hotfix, which can be downloaded
from the following locations:

Citrix Secure Gateway 3.1:

EN - http://support.citrix.com/article/CTX121012

JA - http://support.citrix.com/article/CTX121013

Acknowledgements

Citrix would like to thank the Qualys Vulnerability Research team
(http://www.qualys.com/research/) 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
Center at http://support.citrix.com/.

Obtaining Support on This Issue

If you require technical assistance with this issue, please contact Citrix
Technical Support. Contact details for Citrix Technical Support are
available at http://www.citrix.com/site/ss/supportContacts.asp.

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers
any and all potential vulnerabilities seriously. If you would like to
report a security issue to Citrix, please compose an e-mail to
secure@citrix.com stating the exact version of the product in which the
vulnerability was found and the steps needed to reproduce the vulnerability

This document applies to:

    * Access Essentials 2.0
    * Access Essentials 3.0
    * Secure Gateway 3.0
    * Secure Gateway 3.1

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          Les serveurs de référence du CERT-Renater
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