source: http://www.securityfocus.com/bid/13814/info

Stronghold 2 is affected by a remote denial of service vulnerability.

The issue arises when the game server handles a specially crafted packet.

Stronghold 2 1.2 and prior versions are affected by this vulnerability. 

https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/25757.zip