CVE-2019-12524

Published: 15 April 2020

An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.

Priority

Medium

CVSS 3 base score: 9.8

Status

Package Release Status
squid
Launchpad, Ubuntu, Debian
Upstream
Released (4.8)
Ubuntu 21.04 (Hirsute Hippo) Not vulnerable
(4.10-1ubuntu1)
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(4.10-1ubuntu1)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(4.10-1ubuntu1)
Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
Upstream: http://www.squid-cache.org/Versions/v4/changesets/SQUID-2019_4.patch
squid3
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (3.5.27-1ubuntu1.7)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(code not present)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist