mp4fformat.dll in the QuickTime File Format plugin in RealNetworks RealPlayer 15 and earlier, and RealPlayer SP 1.1.4 Build 12.0.0.756 and earlier, allows remote attackers to cause a denial of service (memory corruption and application crash) via a crafted MP4 file.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-1914
http://www.securitytracker.com/id?1027076
http://secunia.com/advisories/49193
http://packetstormsecurity.org/files/111162/RealPlayer-1.1.4-Memory-Corruption.html