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CVE-2019-9816

5.9 · MEDIUM

A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups.

Published Jul 23, 2019CWE-843EPSS 6.15%

Overview

CVE-2019-9816 is a medium-severity vulnerability. It was published on July 23, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

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=1536768Refwww.mozilla.org/security/advisories/mfsa2019-13/Refwww.mozilla.org/security/advisories/mfsa2019-14/Refwww.mozilla.org/security/advisories/mfsa2019-15/Refbugzilla.mozilla.org/show_bug.cgi?id=1536768Refwww.mozilla.org/security/advisories/mfsa2019-13/Refwww.mozilla.org/security/advisories/mfsa2019-14/Refwww.mozilla.org/security/advisories/mfsa2019-15/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-9816?

CVE-2019-9816 is a medium-severity vulnerability. It was published on July 23, 2019 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2019-9816?

This vulnerability has a CVSS 3.0 base score of 5.9, 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-2019-9816?

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-2019-9816?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-9816 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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