Advisory Published

USN-6844-2: CUPS regression

First published: Fri Jun 28 2024(Updated: )

USN-6844-1 fixed vulnerabilities in the CUPS package. The update lead to the discovery of a regression in CUPS with regards to how the cupsd daemon handles Listen configuration directive. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Rory McNamara discovered that when starting the cupsd server with a Listen configuration item, the cupsd process fails to validate if bind call passed. An attacker could possibly trick cupsd to perform an arbitrary chmod of the provided argument, providing world-writable access to the target.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/cups<2.4.7-1.2ubuntu7.2
2.4.7-1.2ubuntu7.2
Ubuntu=24.04
All of
ubuntu/cups-daemon<2.4.7-1.2ubuntu7.2
2.4.7-1.2ubuntu7.2
Ubuntu=24.04
All of
ubuntu/cups<2.4.6-0ubuntu3.2
2.4.6-0ubuntu3.2
Ubuntu=23.10
All of
ubuntu/cups-daemon<2.4.6-0ubuntu3.2
2.4.6-0ubuntu3.2
Ubuntu=23.10
All of
ubuntu/cups<2.4.1op1-1ubuntu4.10
2.4.1op1-1ubuntu4.10
Ubuntu=22.04
All of
ubuntu/cups-daemon<2.4.1op1-1ubuntu4.10
2.4.1op1-1ubuntu4.10
Ubuntu=22.04
All of
ubuntu/cups<2.3.1-9ubuntu1.8
2.3.1-9ubuntu1.8
Ubuntu=20.04
All of
ubuntu/cups-daemon<2.3.1-9ubuntu1.8
2.3.1-9ubuntu1.8
Ubuntu=20.04
All of
ubuntu/cups<2.2.7-1ubuntu2.10+esm5
2.2.7-1ubuntu2.10+esm5
Ubuntu=18.04
All of
ubuntu/cups-daemon<2.2.7-1ubuntu2.10+esm5
2.2.7-1ubuntu2.10+esm5
Ubuntu=18.04
All of
ubuntu/cups<2.1.3-4ubuntu0.11+esm7
2.1.3-4ubuntu0.11+esm7
Ubuntu=16.04
All of
ubuntu/cups-daemon<2.1.3-4ubuntu0.11+esm7
2.1.3-4ubuntu0.11+esm7
Ubuntu=16.04

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Reference Links

Frequently Asked Questions

  • What is the severity of USN-6844-2?

    USN-6844-2 addresses a regression issue in the CUPS package that impacts the cupsd daemon's handling of the Listen configuration directive.

  • How do I fix USN-6844-2?

    To resolve the issues relating to USN-6844-2, update the CUPS package to the recommended versions provided in the advisory.

  • What versions of CUPS are affected by USN-6844-2?

    USN-6844-2 affects multiple versions of the CUPS package across Ubuntu 16.04, 18.04, 20.04, 22.04, 23.10, and 24.04.

  • Is there a risk of service disruption with USN-6844-2?

    Updating to the fixed version in USN-6844-2 is necessary to prevent potential security risks and ensure continued functionality of the printing service.

  • What is the primary issue addressed in USN-6844-2?

    USN-6844-2 fixes a regression introduced in a previous update, affecting how the CUPS daemon processes configuration directives.

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