USN-1333-1: Libav vulnerabilities

Releases

• Ubuntu 11.10
• Ubuntu 11.04

Packages

• libav - Multimedia player, server, encoder and transcoder

Details

Steve Manzuik discovered that Libav incorrectly handled certain malformed
Matroska files. If a user were tricked into opening a crafted Matroska
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 11.04. (CVE-2011-3504)

Phillip Langlois discovered that Libav incorrectly handled certain
malformed QDM2 streams. If a user were tricked into opening a crafted QDM2
stream 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. (CVE-2011-4351)

Phillip Langlois discovered that Libav incorrectly handled certain
malformed VP3 streams. If a user were tricked into opening a crafted 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. (CVE-2011-4352)

Phillip Langlois discovered that Libav incorrectly handled certain
malformed VP5 and VP6 streams. If a user were tricked into opening a
crafted 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. (CVE-2011-4353)

It was discovered that Libav incorrectly handled certain malformed VMD
files. If a user were tricked into opening a crafted VMD 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.
(CVE-2011-4364)

Phillip Langlois discovered that Libav incorrectly handled certain
malformed SVQ1 streams. If a user were tricked into opening a crafted SVQ1
stream 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. (CVE-2011-4579)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 11.10

• libavformat53 - 4:0.7.3-0ubuntu0.11.10.1
• libavcodec53 - 4:0.7.3-0ubuntu0.11.10.1

Ubuntu 11.04

• libavformat52 - 4:0.6.4-0ubuntu0.11.04.1
• libavcodec52 - 4:0.6.4-0ubuntu0.11.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

• CVE-2011-3504
• CVE-2011-4351
• CVE-2011-4352
• CVE-2011-4353
• CVE-2011-4364
• CVE-2011-4579

Related notices

• USN-1320-1