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USN-6500-2: Squid vulnerabilities

11 December 2023

Several security issues were fixed in Squid.

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Releases

Packages

  • squid3 - Web proxy cache server

Details

USN-6500-1 fixed several vulnerabilities in Squid. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

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. (CVE-2023-46728)

Joshua Rogers discovered that Squid incorrectly handled HTTP Digest
Authentication. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service. (CVE-2023-46847)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-6500-1: squid-common, squid-purge, squid, squid-openssl, squidclient, squid-cgi