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CVE-2019-12524

9.8 · CRITICAL

An issue was discovered in Squid through 4.7.

Published Apr 15, 2020CWE-306EPSS 3.86%

Overview

CVE-2019-12524 is a critical-severity vulnerability. It was published on April 15, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12524.txtReflists.debian.org/debian-lts-announce/2020/07/msg00009.htmlRefsecurity.netapp.com/advisory/ntap-20210205-0006/Refusn.ubuntu.com/4446-1/Refwww.debian.org/security/2020/dsa-4682Refgitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12524.txtReflists.debian.org/debian-lts-announce/2020/07/msg00009.htmlRefsecurity.netapp.com/advisory/ntap-20210205-0006/Refusn.ubuntu.com/4446-1/Refwww.debian.org/security/2020/dsa-4682

How CyberStrike helps

Frequently asked questions

What is CVE-2019-12524?

CVE-2019-12524 is a critical-severity vulnerability. It was published on April 15, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2019-12524?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-12524?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-12524?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-12524 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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