Ubuntu 23.10: USN-6500-1 Moderate: Squid Denial of Service Problems

ubuntu

November 21, 2023

Several security issues were fixed in Squid.

Summary

Several security issues were fixed in Squid.

Software Description:

- squid: Web proxy cache server

Details:

Joshua Rogers discovered that Squid incorrectly handled validating certain

SSL certificates. A remote attacker could possibly use this issue to cause

Squid to crash, resulting in a denial of service. This issue only affected

Ubuntu 22.04 LTS, Ubuntu 23.04, and Ubuntu 23.10. (CVE-2023-46724)

Joshua Rogers discovered that Squid incorrectly handled the Gopher

protocol. A remote attacker could possibly use this issue to cause Squid to

crash, resulting in a denial of service. Gopher support has been disabled

in this update. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04

LTS, and Ubuntu 23.04. (CVE-2023-46728)

Keran Mu and Jianjun Chen discovered that Squid incorrectly handled the

chunked decoder. A remote attacker could possibly use this issue to perform

HTTP request smuggling attacks. (CVE-2023-46846)

Joshua Rogers discovered that Squid incor...

Read the Full Advisory

Topics Covered

security advisory denial of service squid ubuntu http request smuggling SSL certificate handling gopher protocol

Update Instructions

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

Ubuntu 23.10:
   squid                           6.1-2ubuntu1.1

Ubuntu 23.04:
   squid                           5.7-1ubuntu3.1

Ubuntu 22.04 LTS:
   squid                           5.7-0ubuntu0.22.04.2

Ubuntu 20.04 LTS:
   squid                           4.10-1ubuntu1.8

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