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==========================================================================
Ubuntu Security Notice USN-1333-1
January 17, 2012
libav vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
Summary:
Libav could be made to crash or run programs as your login if it opened a
specially crafted file.
Software Description:
- 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:
libavcodec53 4:0.7.3-0ubuntu0.11.10.1
libavformat53 4:0.7.3-0ubuntu0.11.10.1
Ubuntu 11.04:
libavcodec52 4:0.6.4-0ubuntu0.11.04.1
libavformat52 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:
http://www.ubuntu.com/usn/usn-1333-1
CVE-2011-3504, CVE-2011-4351, CVE-2011-4352, CVE-2011-4353,
CVE-2011-4364, CVE-2011-4579
Package Information:
https://launchpad.net/ubuntu/+source/libav/4:0.7.3-0ubuntu0.11.10.1
https://launchpad.net/ubuntu/+source/libav/4:0.6.4-0ubuntu0.11.04.1
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