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AUSCERT External Security Bulletin Redistribution
ESB-2014.1389
Vulnerabilities in Citrix Access Gateway Enterprise Edition Plug-in for
Windows could result in arbitrary code execution
14 August 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Citrix Access Gateway Enterprise Edition Plug-in
Publisher: Citrix
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2011-2593 CVE-2011-2592
Original Bulletin:
http://support.citrix.com/article/CTX134303
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Vulnerabilities in Citrix Access Gateway Enterprise Edition Plug-in for
Windows could result in arbitrary code execution
CTX134303
Created On Aug 09, 2012 Updated On Aug 09, 2012
Security Bulletin
See Applicable Products
Severity: High
Description of Problem
Vulnerabilities have been identified in an ActiveX based component of the
Citrix Access Gateway Enterprise Edition Plug-in for Windows. The
vulnerabilities, when triggered, could result in arbitrary code being executed
in the context of the browser user.
Where clients are configured to allow ActiveX objects to be launched by
untrusted websites, there is a risk that the client could be affected by these
vulnerabilities. In such a deployment, the vulnerabilities could potentially
be triggered by a malicious website that instantiates the ActiveX object.
These vulnerabilities affect the following versions of the Access Gateway
Enterprise Edition software:
Version 10.0 prior to 10.0-69.4
Version 9.3 prior to 9.3-57.5
Version 9.2 all versions
Version 9.1 all versions
Version 9.0 all versions
The Windows plug-in for Access Gateway Standard and Advanced Editions are not
affected by this vulnerability.
This vulnerability has been assigned the following CVE numbers:
CVE-2011-2592
CVE-2011-2593
What Customers Should Do
Citrix recommends that customers upgrade client and server components of their
Citrix Access Gateway deployments to the latest versions. These can be
obtained from the following location:
https://www.citrix.com/English/ss/downloads/results.asp?productID=15005
As an additional mitigation step, customers should consider using the ActiveX
killbit mechanism to prevent usage of the vulnerable control, this has the
following CLSID:
391DFC1F-B9B9-4A3D-A352-9A541A3630A6
For more information on setting a killbit, please consult the Microsoft
Knowledgebase at the following location:
http://support.microsoft.com/kb/240797
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
Centre 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.
Applicable Products
Access Gateway 10
Access Gateway 9.0 Enterprise Edition
Access Gateway 9.1 Enterprise Edition
Access Gateway 9.2 Enterprise Edition
Access Gateway 9.3 Enterprise Edition
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