Ubuntu 5057-1: Squashfs-Tools vulnerability

Advisories

==========================================================================
Ubuntu Security Notice USN-5057-1
August 31, 2021

squashfs-tools vulnerability
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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/1:4.4-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.3-6ubuntu0.18.04.3

Ubuntu 5057-1: Squashfs-Tools vulnerability

August 31, 2021

Summary

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

Severity
Ubuntu Security Notice USN-5057-1

Package Information

https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-2ubuntu0.1 https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.4-1ubuntu0.1 https://launchpad.net/ubuntu/+source/squashfs-tools/1:4.3-6ubuntu0.18.04.3

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