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CVE-2018-12550

8.1 · HIGH

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as tho…

Published Mar 27, 2019CWE-440EPSS 1.35%

Overview

CVE-2018-12550 is a high-severity vulnerability. It was published on March 27, 2019 and has a CVSS 3.0 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.

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

Refbugs.eclipse.org/bugs/show_bug.cgi?id=541870Reflists.debian.org/debian-lts-announce/2019/10/msg00035.htmlRefbugs.eclipse.org/bugs/show_bug.cgi?id=541870Reflists.debian.org/debian-lts-announce/2019/10/msg00035.html

How CyberStrike helps

Frequently asked questions

What is CVE-2018-12550?

CVE-2018-12550 is a high-severity vulnerability. It was published on March 27, 2019 and has a CVSS 3.0 base score of 8.1 (HIGH).

How severe is CVE-2018-12550?

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-12550?

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-2018-12550?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-12550 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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