1. Ubuntu Security Notices
  2. USN-5104-1

USN-5104-1: Squid vulnerability

Publication date

5 October 2021

Overview

Squid could be made to crash or expose sensitive information over the network.

Releases

Packages

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

Details

Lyu discovered that Squid incorrectly handled WCCP protocol data. A remote
attacker could use this issue to cause Squid to crash, resulting in a
denial of service, or possibly obtain sensitive information.

Lyu discovered that Squid incorrectly handled WCCP protocol data. A remote
attacker could use this issue to cause Squid to crash, resulting in a
denial of service, or possibly 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
21.04 hirsute squid –  4.13-1ubuntu4.2
20.04 focal squid –  4.10-1ubuntu1.5
18.04 bionic squid –  3.5.27-1ubuntu1.12

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References

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