USN-4895-1: Squid vulnerabilities

Releases

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

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

• squid - 4.13-1ubuntu2.1

Ubuntu 20.04

• squid - 4.10-1ubuntu1.3

Ubuntu 18.04

• squid - 3.5.27-1ubuntu1.10

Ubuntu 16.04

• squid - 3.5.12-1ubuntu7.16

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

References

• CVE-2020-25097
• CVE-2020-15049

Related notices

• USN-4551-1: squid-cgi, squidclient, squid-common, squid, squid-purge, squid3