Crysis Player Crash ExploitType %S in your name or any other format string variable and type kill. Everyone in the server will crash. You will crash too if you are in third person view ( I don't crash because I patched mine ). This works in both v1.0 and v1.1.
Original Advisory:
http://milw0rm.com/exploits/5201
ATOM:
http://atom.us.to/
