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CVE-2023-29532

5.5 · MEDIUM

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server.

Published Jun 19, 2023EPSS 0.18%

Overview

CVE-2023-29532 is a medium-severity vulnerability. It was published on June 19, 2023 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.

*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.

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=1806394Refwww.mozilla.org/security/advisories/mfsa2023-13/Refwww.mozilla.org/security/advisories/mfsa2023-14/Refwww.mozilla.org/security/advisories/mfsa2023-15/Refbugzilla.mozilla.org/show_bug.cgi?id=1806394Refwww.mozilla.org/security/advisories/mfsa2023-13/Refwww.mozilla.org/security/advisories/mfsa2023-14/Refwww.mozilla.org/security/advisories/mfsa2023-15/

How CyberStrike helps

Frequently asked questions

What is CVE-2023-29532?

CVE-2023-29532 is a medium-severity vulnerability. It was published on June 19, 2023 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-29532?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-29532?

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-2023-29532?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-29532 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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