Heap-based buffer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a long CSEC HTTP response header.
https://exchange.xforce.ibmcloud.com/vulnerabilities/77316
http://support.citrix.com/article/CTX134303
http://secunia.com/secunia_research/2012-27
http://osvdb.org/show/osvdb/84433
http://archives.neohapsis.com/archives/bugtraq/2012-08/0009.html