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CVE-2020-12388

10.0 · CRITICAL

The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape.

Published May 26, 2020CWE-20EPSS 3.52%

Overview

CVE-2020-12388 is a critical-severity vulnerability. It was published on May 26, 2020 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8 and Firefox < 76.

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

Refpacketstormsecurity.com/files/157860/Firefox-Default-Content-Process-DACL-Sandbox-Escape.htmlRefbugzilla.mozilla.org/show_bug.cgi?id=1618911Refwww.mozilla.org/security/advisories/mfsa2020-16/Refwww.mozilla.org/security/advisories/mfsa2020-17/Refpacketstormsecurity.com/files/157860/Firefox-Default-Content-Process-DACL-Sandbox-Escape.htmlRefbugzilla.mozilla.org/show_bug.cgi?id=1618911Refwww.mozilla.org/security/advisories/mfsa2020-16/Refwww.mozilla.org/security/advisories/mfsa2020-17/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-12388?

CVE-2020-12388 is a critical-severity vulnerability. It was published on May 26, 2020 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2020-12388?

This vulnerability has a CVSS 3.1 base score of 10.0, 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-2020-12388?

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-2020-12388?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-12388 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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