The cook codec in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.5, Mac RealPlayer 11.0 through 12.0.0.1444, and Linux RealPlayer 11.0.2.1744 does not properly perform initialization, which has unspecified impact and attack vectors.
http://www.securitytracker.com/id?1024861
http://service.real.com/realplayer/security/12102010_player/en/