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Ubuntu 12.04 LTS: 1478-1 Critical: Libav Denial of Service

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Calendar Grey June 18, 2012
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Recent vulnerabilities in Libav pose potential risks by allowing crashes or unauthorized software execution on Ubuntu systems. Ensure you update your software swiftly to safeguard your device.
Libav could be made to crash or run programs as your login if it opened a specially crafted file.

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:

Mateusz Jurczyk and Gynvael Coldwind discovered that Libav incorrectly

handled certain malformed DV files. If a user were tricked into opening a

crafted DV 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 11.10.

(CVE-2011-3929, CVE-2011-3936)

Mateusz Jurczyk and Gynvael Coldwind discovered that Libav incorrectly

handled certain malformed NSV files. If a user were tricked into opening a

crafted NSV 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 and

Ubuntu 11.10. (CVE-2011-3940)

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu software issue application crash libav

Update Instructions

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

Ubuntu 12.04 LTS:
  libavcodec53                    4:0.8.3-0ubuntu0.12.04.1
  libavformat53                   4:0.8.3-0ubuntu0.12.04.1

Ubuntu 11.10:
  libavcodec53                    4:0.7.6-0ubuntu0.11.10.1
  libavformat53                   4:0.7.6-0ubuntu0.11.10.1

Ubuntu 11.04:
  libavcodec52                    4:0.6.6-0ubuntu0.11.04.1
  libavformat52                   4:0.6.6-0ubuntu0.11.04.1

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

https://ubuntu.com/security/notices/USN-1478-1

CVE-2011-3929, CVE-2011-3936, CVE-2011-3940, CVE-2011-3945,

CVE-2011-3947, CVE-2011-3951, CVE-2011-3952, CVE-2011-4031,

CVE-2012-0848, CVE-2012-0850, CVE-2012-0851, CVE-2012-0852,

CVE-2012-0853, CVE-2012-0858, CVE-2012-0859, CVE-2012-0947

Severity
critical
Lowest
Low
Medium
High
Critical

June 18, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu software issue application crash libav

Package Information

https://launchpad.net/ubuntu/+source/libav/4:0.8.3-0ubuntu0.12.04.1
https://launchpad.net/ubuntu/+source/libav/4:0.7.6-0ubuntu0.11.10.1
https://launchpad.net/ubuntu/+source/libav/4:0.6.6-0ubuntu0.11.04.1

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