[USN-5057-1] Squashfs-Tools vulnerability

========================================================================== Ubuntu Security Notice USN-5057-1 August 31, 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:
Etienne Stalmans 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 1:4.4-2ubuntu0.1
Ubuntu 20.04 LTS: squashfs-tools 1:4.4-1ubuntu0.1
Ubuntu 18.04 LTS: squashfs-tools 1:4.3-6ubuntu0.18.04.3
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5057-1 CVE-2021-40153
Package Information: launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-2ubuntu0.1 launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-1ubuntu0.1 launchpad.net/ubuntu/+source/squashfs-tools/1:4.3-6ubuntu0.18.04.3