USN-1254-1: Thunderbird vulnerabilities

22 December 2011

thunderbird vulnerabilities

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


Multiple vulnerabilities have been fixed in Thunderbird.

Software Description

  • thunderbird - Mozilla Open Source mail and newsgroup client


It was discovered that CVE-2011-3004, which addressed possible privilege escalation in addons, also affected Thunderbird 3.1. An attacker could potentially exploit a user who had installed an add-on that used loadSubscript in vulnerable ways. (CVE-2011-3647)

Yosuke Hasegawa discovered that the Mozilla browser engine mishandled invalid sequences in the Shift-JIS encoding. It may be possible to trigger this crash without the use of debugging APIs, which might allow malicious websites to exploit this vulnerability. An attacker could possibly use this flaw this to steal data or inject malicious scripts into web content. (CVE-2011-3648)

Marc Schoenefeld discovered that using Firebug to profile a JavaScript file with many functions would cause Firefox to crash. An attacker might be able to exploit this without using the debugging APIs which would potentially allow an attacker to remotely crash Thunderbird. (CVE-2011-3650)

Update instructions

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

Ubuntu 11.04
thunderbird - 3.1.16+build2+nobinonly-0ubuntu0.11.04.1
Ubuntu 10.10
thunderbird - 3.1.16+build2+nobinonly-0ubuntu0.10.10.1
Ubuntu 10.04 LTS
thunderbird - 3.1.16+build2+nobinonly-0ubuntu0.10.04.1

To update your system, please follow these instructions:

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