Ubuntu alert USN-5057-1 (squashfs-tools)

From:
             
 
Alex Murray <alex.murray@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-5057-1] Squashfs-Tools vulnerability
Date:
             
 
Tue, 31 Aug 2021 11:22:15 +0930
Message-ID:
             
 
<87v93ml6rz.fsf@canonical.com>
==========================================================================
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:
  https://ubuntu.com/security/notices/USN-5057-1
  CVE-2021-40153

Package Information:
  https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4...
  https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4...
  https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.3...
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