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CVE-2019-12524

Description

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.


Affected Software


CPE Name Name Version
squid-cache:squid squid-cache squid 4.7
debian:debian_linux debian debian linux 9.0
debian:debian_linux debian debian linux 10.0
canonical:ubuntu_linux canonical ubuntu linux 16.04
canonical:ubuntu_linux canonical ubuntu linux 18.04

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