USN-4895-1: Squid vulnerabilities

29 March 2021

Several security issues were fixed in Squid.

Releases

Packages

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

Details

Alex Rousskov and Amit Klein discovered that Squid incorrectly handled
certain Content-Length headers. A remote attacker could possibly use this
issue to perform an HTTP request smuggling attack, resulting in cache
poisoning. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-15049)

Jianjun Chen discovered that Squid incorrectly validated certain input. A
remote attacker could use this issue to perform HTTP Request Smuggling and
possibly access services forbidden by the security controls.
(CVE-2020-25097)

Update instructions

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

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

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