USN-400-1: Thunderbird vulnerabilities

5 January 2007

mozilla-thunderbird vulnerabilities

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10

Software Description


Georgi Guninski and David Bienvenu discovered that long Content-Type and RFC2047-encoded headers we vulnerable to heap overflows. By tricking the user into opening a specially crafted email, an attacker could execute arbitrary code with user privileges. (CVE-2006-6506)

Various flaws have been reported that allow an attacker to execute arbitrary code with user privileges or bypass internal XSS protections by tricking the user into opening a malicious email containing JavaScript. Please note that JavaScript is disabled by default for emails, and it is not recommended to enable it. (CVE-2006-6497, CVE-2006-6498, CVE-2006-6499, CVE-2006-6501, CVE-2006-6502, CVE-2006-6503)

Update instructions

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

Ubuntu 6.10
mozilla-thunderbird -
mozilla-thunderbird-dev -
Ubuntu 6.06 LTS
mozilla-thunderbird -
mozilla-thunderbird-dev -
Ubuntu 5.10
mozilla-thunderbird -
mozilla-thunderbird-dev -

To update your system, please follow these instructions:

After a standard system upgrade you need to restart Thunderbird to effect the necessary changes.