[USN-4895-1] Squid vulnerabilities

========================================================================== Ubuntu Security Notice USN-4895-1 March 29, 2021
squid, squid3 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS – Ubuntu 16.04 LTS
Several security issues were fixed in Squid.
Software Description: – squid: Web proxy cache server – squid3: Web proxy cache server
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: squid 4.13-1ubuntu2.1
Ubuntu 20.04 LTS: squid 4.10-1ubuntu1.3
Ubuntu 18.04 LTS: squid 3.5.27-1ubuntu1.10
Ubuntu 16.04 LTS: squid 3.5.12-1ubuntu7.16
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-4895-1 CVE-2020-15049, CVE-2020-25097
Package Information: launchpad.net/ubuntu/+source/squid/4.13-1ubuntu2.1 launchpad.net/ubuntu/+source/squid/4.10-1ubuntu1.3 launchpad.net/ubuntu/+source/squid3/3.5.27-1ubuntu1.10 launchpad.net/ubuntu/+source/squid3/3.5.12-1ubuntu7.16