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CVE-2020-15683

9.8 · CRITICAL

Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3.

Published Oct 22, 2020CWE-416EPSS 2.67%

Overview

CVE-2020-15683 is a critical-severity vulnerability. It was published on October 22, 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

Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4.

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

Reflists.opensuse.org/opensuse-security-announce/2020-10/msg00057.htmlReflists.opensuse.org/opensuse-security-announce/2020-10/msg00062.htmlReflists.opensuse.org/opensuse-security-announce/2020-10/msg00074.htmlReflists.opensuse.org/opensuse-security-announce/2020-10/msg00077.htmlRefbugzilla.mozilla.org/buglist.cgi?bug_id=1576843%2C1656987%2C1660954%2C1662760%2C1663439%2C1666140Reflists.debian.org/debian-lts-announce/2020/10/msg00027.htmlRefsecurity.gentoo.org/glsa/202010-08Refwww.debian.org/security/2020/dsa-4780Refwww.mozilla.org/security/advisories/mfsa2020-45/Refwww.mozilla.org/security/advisories/mfsa2020-46/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15683?

CVE-2020-15683 is a critical-severity vulnerability. It was published on October 22, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2020-15683?

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-2020-15683?

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-2020-15683?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15683 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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