source: http://www.securityfocus.com/bid/6774/info

t has been reported that a memory corruption bug exists in games based on the Unreal Engine. Under some circumstances, when the game client connects to a server using a excessive length Unreal URL it may be possible for the malformed URL to write over sensitive areas of stack memory causing the client to crash.

unreal://(261 chars)[EIP_byte2][EIP_byte1]
unreal://(258 chars)