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==========================================================================
Ubuntu Security Notice USN-1367-3
February 17, 2012

thunderbird vulnerability
==========================================================================

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

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

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

Software Description:
- thunderbird: Mozilla Open Source mail and newsgroup client

Details:

USN-1367-1 fixed vulnerabilities in libpng. This provides the corresponding
update for Thunderbird.

Original advisory details:
 
 Jueri Aedla discovered that libpng did not properly verify the size used
 when allocating memory during chunk decompression. If a user or automated
 system using libpng were tricked into opening a specially crafted image,
 an attacker could exploit this to cause a denial of service or execute
 code with the privileges of the user invoking the program. (CVE-2011-3026)

Update instructions:

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

Ubuntu 11.04:
  thunderbird                     3.1.19+build1+nobinonly-0ubuntu0.11.04.1

Ubuntu 10.10:
  thunderbird                     3.1.19+build1+nobinonly-0ubuntu0.10.10.1

Ubuntu 10.04 LTS:
  thunderbird                     3.1.19+build1+nobinonly-0ubuntu0.10.04.1

After a standard system update you need to restart Thunderbird to make all
the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1367-3
  http://www.ubuntu.com/usn/usn-1367-1
  CVE-2011-3026, https://launchpad.net/bugs/933399

Package Information:
  https://launchpad.net/ubuntu/+source/thunderbird/3.1.19+build1+nobinonly-0ubuntu0.11.04.1
  https://launchpad.net/ubuntu/+source/thunderbird/3.1.19+build1+nobinonly-0ubuntu0.10.10.1
  https://launchpad.net/ubuntu/+source/thunderbird/3.1.19+build1+nobinonly-0ubuntu0.10.04.1



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