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CVE-2020-15664

6.5 · MEDIUM

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to inst…

Published Oct 1, 2020CWE-863EPSS 1.39%

Overview

CVE-2020-15664 is a medium-severity vulnerability. It was published on October 1, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.

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

Refbugzilla.mozilla.org/show_bug.cgi?id=1658214Refwww.mozilla.org/security/advisories/mfsa2020-36/Refwww.mozilla.org/security/advisories/mfsa2020-37/Refwww.mozilla.org/security/advisories/mfsa2020-38/Refwww.mozilla.org/security/advisories/mfsa2020-39/Refwww.mozilla.org/security/advisories/mfsa2020-40/Refwww.mozilla.org/security/advisories/mfsa2020-41/Refbugzilla.mozilla.org/show_bug.cgi?id=1658214Refwww.mozilla.org/security/advisories/mfsa2020-36/Refwww.mozilla.org/security/advisories/mfsa2020-37/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15664?

CVE-2020-15664 is a medium-severity vulnerability. It was published on October 1, 2020 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2020-15664?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-15664?

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-2020-15664?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15664 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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