Hi

I have the Password to a VNC-Server, but the Workstation is Locked, and i want to take Control over that box

Is there a trick to execute Commands on the box, or get a shell??

depending on what version i sorta remember a exploit for a shell a long time ago

yeh...there exist a Advisory from 2001:

http://www.securityfocus.com/bid/2306

But i've seen no exploit.. :/

It is possible, that the vnc-server on that box is that old

there's a pretty good chance the computer isn't that old. the last two 'exploits' for vnc that ive heard were getting the password from he registry, and a man in the middle attack fr hi-jacking a session. if the work station is locked vnc is pretty usuless. your better of trying other means of getting a shell