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Ubuntu Security Notice USN-6844-1
June 24, 2024

cups vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 24.04 LTS
• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary:

CUPS could be made to arbitrary chmod paths with specially
crafted configuration file.

Software Description:

• cups: Common UNIX Printing System™

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.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
cups 2.4.7-1.2ubuntu7.1

Ubuntu 23.10
cups 2.4.6-0ubuntu3.1

Ubuntu 22.04 LTS
cups 2.4.1op1-1ubuntu4.9

Ubuntu 20.04 LTS
cups 2.3.1-9ubuntu1.7

Ubuntu 18.04 LTS
cups 2.2.7-1ubuntu2.10+esm4
Available with Ubuntu Pro

Ubuntu 16.04 LTS
cups 2.1.3-4ubuntu0.11+esm6
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6844-1
CVE-2024-35235

Package Information:
https://launchpad.net/ubuntu/+source/cups/2.4.7-1.2ubuntu7.1
https://launchpad.net/ubuntu/+source/cups/2.4.6-0ubuntu3.1
https://launchpad.net/ubuntu/+source/cups/2.4.1op1-1ubuntu4.9
https://launchpad.net/ubuntu/+source/cups/2.3.1-9ubuntu1.7