[USN-5180-1] Mailman vulnerability

========================================================================== Ubuntu Security Notice USN-5180-1 December 07, 2021
mailman vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
A system hardening measure could be bypassed.
Software Description: – mailman: Web-based mailing list manager
It was discovered that Mailman incorrectly handled CSRF tokens. A remote list member or moderator could possibly use their own token to craft an admin request CSRF attack and set a new admin password or make other changes.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: mailman 1:2.1.26-1ubuntu0.6
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5180-1 CVE-2021-44227
Package Information: launchpad.net/ubuntu/+source/mailman/1:2.1.26-1ubuntu0.6