==========================================================================
Ubuntu Security Notice USN-6907-1
July 23, 2024

squid, squid3 vulnerability
==========================================================================

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

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Squid could be made to crash if it processed specially crafted characters.

Software Description:
- squid: Web proxy cache server
- squid3: Web proxy cache server

Details:

Joshua Rogers discovered that Squid did not properly handle multi-byte
characters during Edge Side Includes (ESI) processing. A remote attacker
could possibly use this issue to cause a memory corruption error, leading
to a denial of service.

Update instructions:

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

Ubuntu 24.04 LTS
   squid                           6.6-1ubuntu5.1

Ubuntu 22.04 LTS
   squid                           5.9-0ubuntu0.22.04.2

Ubuntu 20.04 LTS
   squid                           4.10-1ubuntu1.13

Ubuntu 18.04 LTS
   squid                           3.5.27-1ubuntu1.14+esm3
                                   Available with Ubuntu Pro
   squid3                          3.5.27-1ubuntu1.14+esm3
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   squid                           3.5.12-1ubuntu7.16+esm4
                                   Available with Ubuntu Pro
   squid3                          3.5.12-1ubuntu7.16+esm4
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-6907-1
   CVE-2024-37894

Package Information:
   https://launchpad.net/ubuntu/+source/squid/6.6-1ubuntu5.1
   https://launchpad.net/ubuntu/+source/squid/5.9-0ubuntu0.22.04.2
   https://launchpad.net/ubuntu/+source/squid/4.10-1ubuntu1.13