Multiple heap-based buffer overflows in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.5, and Linux RealPlayer 11.0.2.1744 allow remote attackers to have an unspecified impact via a crafted header in an IVR file.
http://www.securitytracker.com/id?1024861
http://service.real.com/realplayer/security/12102010_player/en/