source: http://www.securityfocus.com/bid/41737/info

Unreal Engine is prone to a denial-of-service vulnerability.

An attacker can exploit this issue to crash the affected server, resulting in denial-of-service conditions.

The following games which are developed with Unreal Engine are affected:

Rainbow Six: Raven Shield
Deus Ex
Land of the Dead
Postal 2
Rune
Shadow Ops
Unreal 2
Unreal Tournament
Unreal Tournament 2003
WarPath
XIII
Other games may also be affected. 

https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/34340.zip