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CVE-2019-12526

9.8 · CRITICAL

An issue was discovered in Squid before 4.9.

Published Nov 26, 2019CWE-787EPSS 20.25%

Overview

CVE-2019-12526 is a critical-severity vulnerability. It was published on November 26, 2019 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 before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap.

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

Refwww.squid-cache.org/Advisories/SQUID-2019_7.txtRefbugzilla.suse.com/show_bug.cgi?id=1156326Reflists.debian.org/debian-lts-announce/2019/12/msg00011.htmlReflists.debian.org/debian-lts-announce/2020/07/msg00009.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTM74TU2BSLT5B3H4F3UDW53672NVLMC/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UEMOYTMCCFWK5NOXSXEIH5D2VGWVXR67/Refsecurity.gentoo.org/glsa/202003-34Refusn.ubuntu.com/4213-1/Refwww.debian.org/security/2020/dsa-4682Refwww.squid-cache.org/Advisories/SQUID-2019_7.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2019-12526?

CVE-2019-12526 is a critical-severity vulnerability. It was published on November 26, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2019-12526?

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-2019-12526?

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-2019-12526?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-12526 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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