CVE-2018-12379

moderate-risk
Published 2018-10-18

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.

Do I need to act?

-
0.10% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (14)

Affected Vendors

Debian Redhat Mozilla

References (28)

Third Party Advisory http://www.securityfocus.com/bid/105280
Third Party Advisory http://www.securitytracker.com/id/1041610
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2692
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2693
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3403
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3458
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1473113
Mailing List https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html
Third Party Advisory https://security.gentoo.org/glsa/201810-01
Third Party Advisory https://security.gentoo.org/glsa/201811-13
Third Party Advisory https://www.debian.org/security/2018/dsa-4327
Vendor 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/
Third Party Advisory http://www.securityfocus.com/bid/105280
Third Party Advisory http://www.securitytracker.com/id/1041610
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2692
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2693
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3403
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3458
and 8 more references
42
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 0/34 · Minimal
Exposure 18/34 · Moderate