[USN-5168-2] Thunderbird vulnerability

========================================================================== Ubuntu Security Notice USN-5168-2 December 01, 2021
thunderbird vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Thunderbird could be made to crash or run programs if it verified a specially crafted signature.
Software Description: – thunderbird: Mozilla Open Source mail and newsgroup client
Tavis Ormandy discovered that NSS, included with Thunderbird, incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause Thunderbird to crash, resulting in a denial of service, or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: thunderbird 1:91.3.1+build1-0ubuntu0.21.10.2
Ubuntu 21.04: thunderbird 1:78.14.0+build1-0ubuntu0.21.04.2
Ubuntu 20.04 LTS: thunderbird 1:78.14.0+build1-0ubuntu0.20.04.2
Ubuntu 18.04 LTS: thunderbird 1:78.14.0+build1-0ubuntu0.18.04.2
After a standard system update you need to restart Thunderbird to make all the necessary changes.
References: ubuntu.com/security/notices/USN-5168-2 ubuntu.com/security/notices/USN-5168-1 CVE-2021-43527
Package Information: launchpad.net/ubuntu/+source/thunderbird/1:91.3.1+build1-0ubuntu0.21.10.2 launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.21.04.2 launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.20.04.2 launchpad.net/ubuntu/+source/thunderbird/1:78.14.0+build1-0ubuntu0.18.04.2