OpenSSH contains a flaw that may allow or enable some X11 forwarding functionality unintentionally. The issue can occur when multiple X11 forwarding requests are made on the same session, single_connection listeners or when an X11 listener is orphaned after a session goes away.
Classification
Location:
Local Access Required
Attack Type:
Misconfiguration
Impact:
Loss of Integrity
Exploit:
Exploit Rumored
Disclosure:
OSVDB Verified
Solution
Upgrade to version 4.2p1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.