Stack-based buffer overflow in the AntServer Module (AntServer.exe) in BigAnt IM Server 2.50 allows remote attackers to execute arbitrary code via a long GET request to TCP port 6660.
http://www.vupen.com/english/advisories/2009/2679
http://www.exploit-db.com/exploits/9690
http://www.exploit-db.com/exploits/9673
http://www.attrition.org/pipermail/vim/2009-September/002271.html