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CVE-2022-40958

6.5 · MEDIUM

By injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite cookies from a secure context, leading to session…

Published Dec 22, 2022CWE-74EPSS 1.13%

Overview

CVE-2022-40958 is a medium-severity vulnerability. It was published on December 22, 2022 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 injecting a cookie with certain special characters, an attacker on a shared subdomain which is not a secure context could set and thus overwrite cookies from a secure context, leading to session fixation and other attacks. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.

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=1779993Refwww.mozilla.org/security/advisories/mfsa2022-40/Refwww.mozilla.org/security/advisories/mfsa2022-41/Refwww.mozilla.org/security/advisories/mfsa2022-42/Refbugzilla.mozilla.org/show_bug.cgi?id=1779993Refwww.mozilla.org/security/advisories/mfsa2022-40/Refwww.mozilla.org/security/advisories/mfsa2022-41/Refwww.mozilla.org/security/advisories/mfsa2022-42/

How CyberStrike helps

Frequently asked questions

What is CVE-2022-40958?

CVE-2022-40958 is a medium-severity vulnerability. It was published on December 22, 2022 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2022-40958?

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-2022-40958?

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-2022-40958?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-40958 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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