Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, and RealPlayer Enterprise 2.1.2 allows remote attackers to have an unspecified impact via a crafted QCP file.
http://www.securityfocus.com/bid/44144
http://service.real.com/realplayer/security/10152010_player/en/