========================================================================== Ubuntu Security Notice USN-5078-3 October 13, 2021
squashfs-tools vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.04 LTS 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 a vulnerability in Squashfs-Tools. That update was incomplete and could still result in Squashfs-Tools mishandling certain malformed SQUASHFS files. This update fixes the problem. We apologize for the inconvenience. Original advisory 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 1:4.4-2ubuntu0.3 Ubuntu 20.04 LTS: squashfs-tools 1:4.4-1ubuntu0.3 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5078-3 https://ubuntu.com/security/notices/USN-5078-1 CVE-2021-41072 Package Information: https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-2ubuntu0.3 https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-1ubuntu0.3
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