========================================================================== 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: https://ubuntu.com/security/notices/USN-5151-1 CVE-2021-43331, CVE-2021-43332, https://launchpad.net/bugs/1949401, https://launchpad.net/mailman/+bug/1949403 Package Information: https://launchpad.net/ubuntu/+source/mailman/1:2.1.26-1ubuntu0.5
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