CVE-2018-12379

Name: CVE-2018-12379
Creator: NVD / NIST
Published: 2018-10-18T13:29:05.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.39%

Last modified Jun 17, 2026

CVE-2018-12379 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.39%

31.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Server Eus	7.6
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Mozilla	Firefox	< 60.2.0
Mozilla	Firefox	< 62.0
Mozilla	Thunderbird	< 60.2.1

References

http://www.securityfocus.com/bid/105280Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:2692Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2693Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1473113Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://security.gentoo.org/glsa/201811-13Third Party Advisory
https://www.debian.org/security/2018/dsa-4327Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-20/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-25/Vendor Advisory
http://www.securityfocus.com/bid/105280Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:2692Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2693Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1473113Issue Tracking, Permissions Required, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201810-01Third Party Advisory
https://security.gentoo.org/glsa/201811-13Third Party Advisory
https://www.debian.org/security/2018/dsa-4327Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-20/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-25/Vendor Advisory

Timeline

Published: Oct 18, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12379?

How severe is CVE-2018-12379?

Severity scoring for CVE-2018-12379 is pending analysis. The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12379?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12379?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST