USN-7845-1: Squid vulnerability

Publication date

28 October 2025

Overview

Squid would allow unintended access to sensitive information over the network.


Packages

  • squid - Web proxy cache server
  • squid3 - Web proxy cache server

Details

Leonardo Giovannini discovered that Squid failed to redact HTTP
Authentication credentials in a default configuration. An attacker could
possibly use this issue to obtain sensitive information.

Leonardo Giovannini discovered that Squid failed to redact HTTP
Authentication credentials in a default configuration. An attacker could
possibly use this issue to obtain sensitive information.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
25.10 questing squid –  6.13-1ubuntu4.1
25.04 plucky squid –  6.13-1ubuntu1.2
24.04 LTS noble squid –  6.13-0ubuntu0.24.04.3
22.04 LTS jammy squid –  5.9-0ubuntu0.22.04.4
20.04 LTS focal squid –  4.10-1ubuntu1.13+esm1  
18.04 LTS bionic squid –  3.5.27-1ubuntu1.14+esm4  
squid3 –  3.5.27-1ubuntu1.14+esm4  
16.04 LTS xenial squid –  3.5.12-1ubuntu7.16+esm5  
squid3 –  3.5.12-1ubuntu7.16+esm5  

Reduce your security exposure

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Have additional questions?

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