========================================================================= Ubuntu Security Notice USN-5078-2 September 15, 2021 squashfs-tools vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM Summary: Squashfs-Tools could be made to overwrite files. Software Description: - squashfs-tools: Tools to create and modify squashfs filesystems Details: USN-5078-1 fixed several vulnerabilities in Squashfs-Tools. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: Etienne Stalmans discovered that Squashfs-Tools mishandled certain malformed SQUASHFS files. An attacker could use this vulnerability to write arbitrary files to the filesystem. (CVE-2021-40153) Richard Weinberger discovered that Squashfs-Tools mishandled certain malformed SQUASHFS files. An attacker could use this vulnerability to write arbitrary files to the filesystem. (CVE-2021-41072) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: squashfs-tools 1:4.3-3ubuntu2.16.04.3+esm1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5078-2 https://ubuntu.com/security/notices/USN-5078-1 CVE-2021-40153, CVE-2021-41072