Cesar Bernardini and Felipe Andres Manzano discovered that FFmpeg incorrectly handled certain malformed flic files. If a user were tricked into opening a crafted flic file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program. This issue only affected Ubuntu 8.04 LTS, 9.10 and 10.04 LTS. Dan Rosenberg discovered that FFmpeg incorrectly handled certain malformed wmv files. If a user were tricked into opening a crafted wmv file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program. This issue only affected Ubuntu 8.04 LTS, 9.10 and 10.04 LTS. It was discovered that FFmpeg incorrectly handled certain malformed ogg files. If a user were tricked into opening a crafted ogg file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program. It was discovered that FFmpeg incorrectly handled certain malformed WebM files. If a user were tricked into opening a crafted WebM file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program. Dan Rosenberg discovered that FFmpeg incorrectly handled certain malformed RealMedia files. If a user were tricked into opening a crafted RealMedia file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program. This issue only affected Ubuntu 8.04 LTS, 9.10 and 10.04 LTS. Dan Rosenberg discovered that FFmpeg incorrectly handled certain malformed VC1 files. If a user were tricked into opening a crafted VC1 file, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program