========================================================================== Ubuntu Security Notice USN-5078-1 September 15, 2021 squashfs-tools vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Squashfs-Tools could be made to overwrite files. Software Description: - squashfs-tools: Tools to create and modify squashfs filesystems Details: Richard Weinberger discovered that Squashfs-Tools mishandled certain malformed SQUASHFS files. An attacker could use this vulnerability to write arbitrary files to the filesystem. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: squashfs-tools 1:4.4-2ubuntu0.2 Ubuntu 20.04 LTS: squashfs-tools 1:4.4-1ubuntu0.2 Ubuntu 18.04 LTS: squashfs-tools 1:4.3-6ubuntu0.18.04.4 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5078-1 CVE-2021-41072 Package Information: https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-2ubuntu0.2 https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-1ubuntu0.2 https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.3-6ubuntu0.18.04.4