Format string vulnerability in the Lithtech engine, as used in multiple games, allows remote authenticated users to cause a denial of service (application crash) via format string specifiers in (1) a nickname or (2) a message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17972
http://www.securityfocus.com/bid/11610
http://secunia.com/advisories/17317
http://secunia.com/advisories/13116/