Multiple Citrix products Session Reliability Service security bypass
| citrix-session-security-bypass (34448) |  Medium Risk |
Description:
Multiple Citrix products could allow a remote attacker to bypass security policy restrictions, caused by an error in the Session Reliability Service. If the Session Reliability feature is enabled, a remote attacker could send a specially-crafted request and establish a TCP connection to arbitrary ports. An attacker could exploit this vulnerability to bypass security policies and gain remote access to local ports on the machine.
Platforms Affected:
- Citrix, Access Essentials 1.0
- Citrix, Access Essentials 1.5
- Citrix, MetaFrame Presentation Server 3.0
- Citrix, Presentation Server 4.0
- Microsoft, Windows 2000 Server
- Microsoft, Windows 2003 Server x64
Remedy:
Refer to CTX112964 for patch or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- CTX112964, Vulnerability in Citrix Presentations Server's Session Reliability service could result in network security policy bypass at http://support.citrix.com/article/CTX112964.
- FORTCONSULT Security Advisory , Citrix "Session Reliability Protocol" Firewall Bypass at http://www.fortconsult.net/images/pdf/Citrix_Session-Reliability_OpenProxy.pdf.
- BID-24116: Multiple Citrix Products Session Reliability Server Security Bypass Vulnerability
- 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.
- SA25371: Citrix Products Session Reliability Service Security Bypass
- SECTRACK ID: 1018098: Citrix Presentation Server Session Reliability Flaw Lets Remote Users Bypass Security Policy Restrictions
- VUPEN/ADV-2007-1918: Citrix MetaFrame Presentation Server Session Reliability Security Bypass Vulnerability
Reported:
May 16, 2007
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