[USN-5151-1] Mailman vulnerabilities

========================================================================== Ubuntu Security Notice USN-5151-1 November 18, 2021
mailman vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS – Ubuntu 16.04 ESM
Summary:
Several security issues were fixed in Mailman.
Software Description: – mailman: Web-based mailing list manager
Details:
It was discovered that Mailman incorrectly handled certain URL. An attacker could possibly use this issue to execute arbitrary code. (CVE-2021-43331)
It was discovered that Mailman incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information. (CVE-2021-43332)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: mailman 1:2.1.26-1ubuntu0.5
Ubuntu 16.04 ESM: mailman 1:2.1.20-1ubuntu0.6+esm2
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5151-1 CVE-2021-43331, CVE-2021-43332, launchpad.net/bugs/1949401, launchpad.net/mailman/+bug/1949403
Package Information: launchpad.net/ubuntu/+source/mailman/1:2.1.26-1ubuntu0.5