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CVE-2019-11743

3.7 · LOW

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes t…

Published Sep 27, 2019CWE-203EPSS 1.80%

Overview

CVE-2019-11743 is a low-severity vulnerability. It was published on September 27, 2019 and has a CVSS 3.1 base score of 3.7 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

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/2019-10/msg00009.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00010.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00011.htmlReflists.opensuse.org/opensuse-security-announce/2019-10/msg00017.htmlRefbugzilla.mozilla.org/show_bug.cgi?id=1560495Refsecurity.gentoo.org/glsa/201911-07Refusn.ubuntu.com/4150-1/Refw3c.github.io/navigation-timingRefwww.mozilla.org/security/advisories/mfsa2019-25/Refwww.mozilla.org/security/advisories/mfsa2019-26/

How CyberStrike helps

Frequently asked questions

What is CVE-2019-11743?

CVE-2019-11743 is a low-severity vulnerability. It was published on September 27, 2019 and has a CVSS 3.1 base score of 3.7 (LOW).

How severe is CVE-2019-11743?

This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-11743?

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-2019-11743?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-11743 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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