========================================================================== Ubuntu Security Notice USN-5766-1 December 07, 2022 heimdal vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Heimdal could be made to crash if it received specially crafted network traffic. Software Description: - heimdal: Heimdal Kerberos Network Authentication Protocol Details: It was discovered that Heimdal did not properly manage memory when normalizing Unicode. An attacker could possibly use this issue to cause a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: libwind0-heimdal 7.7.0+dfsg-1ubuntu1.2 Ubuntu 18.04 LTS: libwind0-heimdal 7.5.0+dfsg-1ubuntu0.2 Ubuntu 16.04 ESM: libwind0-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm2 Ubuntu 14.04 ESM: libwind0-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm2 After a standard system update you need to restart any application using Heimdal libraries to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5766-1 CVE-2022-41916 Package Information: https://launchpad.net/ubuntu/+source/heimdal/7.7.0+dfsg-1ubuntu1.2 https://launchpad.net/ubuntu/+source/heimdal/7.5.0+dfsg-1ubuntu0.2