Several vulnerabilities have been discovered in ffmpeg, a multimedia player, server and encoder. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2010-3908 FFmpeg before 0.5.4, allows remote attackers to cause a denial of service or possibly execute arbitrary code via a malformed WMV file. CVE-2010-4704 libavcodec/vorbis_dec.c in the Vorbis decoder in FFmpeg allows remote attackers to cause a denial of service via a crafted .ogg file, related to the vorbis_floor0_decode function. CVE-2011-0480 Multiple buffer overflows in vorbis_dec.c in the Vorbis decoder in FFmpeg allow remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted WebM file, related to buffers for the channel floor and the channel residue. CVE-2011-0722 FFmpeg allows remote attackers to cause a denial of service or possibly execute arbitrary code via a malformed RealMedia file.