OpenSSH Client Unauthorized Remote Forwarding Vulnerability

OpenSSH is a free implementation of the SSH protocol. The OpenSSH software package is maintained primarily by OpenBSD Project. A vulnerability exists which can allow an attacker unauthorized access to restricted resources.

The problem occurs in the OpenSSH Client. The client does not sufficiently check for the ssh-agent and X11 forwarding options after an SSH session has been negotiated. This allows the server end of the SSH session to gain access to either of these two resources on the client side. This could result in a malicious server gaining access to the X11 display and remotely watching the desktop and keystokes. This problem can also allow a malicious server access to the local ssh-agent.


 

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