Multiple vulnerabilities have been fixed in Thunderbird.
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)
28 November 2011
A security issue affects these releases of Ubuntu and its derivatives:
Multiple vulnerabilities have been fixed in Thunderbird.
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 could potentially remotely crash Thunderbird, resulting in a denial of service. (CVE-2011-3650)
Jason Orendorff, Boris Zbarsky, Gregg Tavares, Mats Palmgren, Christian Holler, Jesse Ruderman, Simona Marcu, Bob Clary, and William McCloskey discovered multiple memory safety bugs in the browser engine used in Thunderbird and other Mozilla-based products. An attacker might be able to use these flaws to execute arbitrary code with the privileges of the user invoking Thunderbird or possibly crash Thunderbird resulting in a denial of service. (CVE-2011-3651)
It was discovered that Thunderbird could be caused to crash under certain conditions, due to an unchecked allocation failure, resulting in a denial of service. It might also be possible to execute arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2011-3652)
Aki Helin discovered that Thunderbird does not properly handle links from SVG mpath elements to non-SVG elements. An attacker could use this vulnerability to crash Thunderbird, resulting in a denial of service, or possibly execute arbitrary code with the privileges of the user invoking Thunderbird. (CVE-2011-3654)
It was discovered that an internal privilege check failed to respect the NoWaiverWrappers introduced with Thunderbird 5. An attacker could possibly use this to gain elevated privileges within Thunderbird for web content. (CVE-2011-3655)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Thunderbird to make all the necessary changes.
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