source: http://www.securityfocus.com/bid/25461/info

Microsoft MSN Messenger is prone to a buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data.

Successfully exploiting this issue allows remote attackers to execute arbitrary code in the context of the application. Failed exploit attempts will likely result in denial-of-service conditions.

http://www.exploit-db.com/sploits/30537.rar