When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1575-1 thunderbird security update
Debian DSA Debian DSA DSA-4327-1 thunderbird security update
EUVD EUVD EUVD-2018-4353 When the Mozilla Updater opens a MAR format file which contains a very long item filename, an out-of-bounds write can be triggered, leading to a potentially exploitable crash. This requires running the Mozilla Updater manually on the local system with the malicious MAR file in order to occur. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-05T08:30:59.942Z

Reserved: 2018-06-14T00:00:00

Link: CVE-2018-12379

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-10-18T13:29:05.307

Modified: 2025-11-25T17:50:16.803

Link: CVE-2018-12379

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-09-05T00:00:00Z

Links: CVE-2018-12379 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses