U radu programskog paketa ffmpeg uočeni su novi sigurnosni propusti. Udaljeni napadač ih može iskoristiti za pokretanje zlonamjernog programskog koda ili izvođenje napada uskraćivanja usluge (DoS).

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Ubuntu Security Notice USN-1320-1
January 05, 2012

ffmpeg vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

FFmpeg could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- ffmpeg: multimedia player, server and encoder

Details:

Steve Manzuik discovered that FFmpeg 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. (CVE-2011-3504)

Phillip Langlois discovered that FFmpeg 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 FFmpeg 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. This issue only affected Ubuntu 10.10. (CVE-2011-4352)

Phillip Langlois discovered that FFmpeg 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 FFmpeg 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 FFmpeg 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 10.10:
  libavcodec52                    4:0.6-2ubuntu6.3
  libavformat52                   4:0.6-2ubuntu6.3

Ubuntu 10.04 LTS:
  libavcodec52                    4:0.5.1-1ubuntu1.3
  libavformat52                   4:0.5.1-1ubuntu1.3

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1320-1
  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/ffmpeg/4:0.6-2ubuntu6.3
  https://launchpad.net/ubuntu/+source/ffmpeg/4:0.5.1-1ubuntu1.3