========================================================================== Ubuntu Security Notice USN-5191-1 December 14, 2021 flatpak 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 Summary: A system hardening measure could be bypassed. Software Description: - flatpak: Application deployment framework for desktop apps Details: It was discovered that Flatpak incorrectly handled certain AF_UNIX sockets. An attacker could use this to specially craft a Flatpak application that could escape sandbox confinement. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10: flatpak 1.10.2-3ubuntu0.1 libflatpak0 1.10.2-3ubuntu0.1 Ubuntu 21.04: flatpak 1.10.2-1ubuntu1.1 libflatpak0 1.10.2-1ubuntu1.1 Ubuntu 20.04 LTS: flatpak 1.6.5-0ubuntu0.4 libflatpak0 1.6.5-0ubuntu0.4 Ubuntu 18.04 LTS: flatpak 1.0.9-0ubuntu0.4 libflatpak0 1.0.9-0ubuntu0.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5191-1 CVE-2021-41133 Package Information: https://launchpad.net/ubuntu/+source/flatpak/1.10.2-3ubuntu0.1 https://launchpad.net/ubuntu/+source/flatpak/1.10.2-1ubuntu1.1 https://launchpad.net/ubuntu/+source/flatpak/1.6.5-0ubuntu0.4 https://launchpad.net/ubuntu/+source/flatpak/1.0.9-0ubuntu0.4