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AUSCERT External Security Bulletin Redistribution
Vulnerability in Citrix Receiver with Online Plug-in for
Windows could result in arbitrary code execution
13 September 2012
AusCERT Security Bulletin Summary
Product: Citrix Receiver
Citrix XenApp Plugin for Windows
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
CVE Names: CVE-2012-4603
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Vulnerability in Citrix Receiver with Online Plug-in for Windows could result
in arbitrary code execution
Document ID: CTX134681 / Created On: Sep 12, 2012 / Updated On: Sep 12, 2012
Description of Problem
A vulnerability has been identified in the Citrix Receiver with Online Plug-in
for Windows that could potentially allow an attacker to execute arbitrary code
on the client device in the context of the currently logged in user.
This vulnerability is present in all versions of the Citrix Receiver for
Windows up to and including version 3.2 and all versions of the Citrix Online
Plug-in for Windows up to and including version 12.1.
This vulnerability has been assigned the following CVE:
What Customers Should Do
This vulnerability has been addressed in the following products:
- - The Citrix Receiver for Windows version 3.3 with Online Plug-in for Windows
version 13.3 and later
- - Version 12.3 of the Citrix Online Plug-in for Windows.
Citrix recommends that customers upgrade their Citrix Receivers and Online
Plug-ins to these versions and later. These new versions can be obtained from
the following location:
To conduct a successful exploit, an attacker would have to convince a user to
manually lauch a specially crafted malicious file from an SMB or WebDAV
fileserver. Deployments that prevent connections to potentially untrustworthy
fileservers will be less exposed to this vulnerability.
Citrix thanks Alexey Tyurin of the Digital Security Research Group
(http://dsecrg.com/) 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
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 firstname.lastname@example.org
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:
- - Receiver for Macintosh
- - Receiver for Windows
- - XenApp Plug-in for Windows (32/64 Bit)
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