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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