CVE-2007-2850
The Session Reliability Service (XTE) in Citrix MetaFrame Presentation Server 3.0, Presentation Server 4.0, and Access Essentials 1.0 and 1.5, allows remote attackers to bypass network security policies and connect to arbitrary TCP ports via a modified address:port string.
Date published : 2007-05-24
http://support.citrix.com/article/CTX112964
http://fortconsult.net/files/fortconsult.dk/citrix_advisory.pdf