If X11forwarding is turned on, and remote xauth is patched, sshing into a compromised server can allow programs to be run on under your ssh client. This is turned on by default in ssh1, ssh2, and openssh.
If X11forwarding is turned on, and remote xauth is patched, sshing into a compromised server can allow programs to be run on under your ssh client. This is turned on by default in ssh1, ssh2, and openssh.