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  4. Web Attack: Citrix Access Gateway CVE-2011-2882

Web Attack: Citrix Access Gateway CVE-2011-2882

Severity: High

This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.


This signature detects an attempt to exploit a buffer overflow vulnerability in Citrix Access Gateway Plug-in ActiveX Control.

Additional Information

A stack-based buffer-overflow occurs when the control processes HTTP header data from the Access Gateway server.

The vulnerable control is identified by CLSID:

Attackers may exploit these issues by enticing an unsuspecting victim to view a malicious webpage.

Successfully exploiting these issues will allow attackers to execute arbitrary code within the context of the application that uses the ActiveX control (typically Internet Explorer).


  • Citrix Access Gateway Plug-in 8.1-67.7
  • Citrix Access Gateway Plug-in 9.0-70.5
  • Citrix Access Gateway Plug-in 9.1-96.4
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