RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, RealPlayer Enterprise 2.1.2, and Mac RealPlayer 11.0 through 12.0.0.1444 do not properly parse spectral data in AAC files, which has unspecified impact and remote attack vectors.
http://www.securitytracker.com/id?1024861
http://service.real.com/realplayer/security/12102010_player/en/