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TITLE:
Citrix XenApp Online Plug-in / Receiver Certificate Spoofing
Vulnerability

SECUNIA ADVISORY ID:
SA37319

VERIFY ADVISORY:
http://secunia.com/advisories/37319/

DESCRIPTION:
A vulnerability has been reported in Citrix XenApp Online Plug-in and
Citrix Receiver for iPhone, which can be exploited by malicious people
to conduct spoofing attacks.

The vulnerability is caused due to an unspecified error when
processing SSL/TLS certificates. This can be exploited to e.g.
conduct Man-in-the-Middle (MitM) attacks via specially crafted
certificates.

SOLUTION:
Update to a fixed version.
http://www.citrix.com/English/SS/downloads/results.asp?productId=186&c1=sot2755

Citrix Online Plug-in for Windows:
Update to version version 11.0.150, 11.2, or later

Citrix Online Plug-in for Mac:
Update to version 11.0 or later.

Citrix Receiver for iPhone:
Update to version 1.0.3 or later.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://support.citrix.com/article/CTX123248

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