[USN-6844-1] CUPS vulnerability

[Leonidas S. Barbosa]

==========================================================================
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(tm)

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

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