Buffer overflow in Mozilla Firefox
CVE-2018-12379
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.6
- Red Hat Enterprise Linux Server Eus — versions 7.5, 7.6
- Red Hat Enterprise Linux Server Tus — versions 7.6
- Red Hat Enterprise Linux Workstation — versions 6.0, 7.0
Weakness classification (CWE)
References
- www.securityfocus.com/bid/105280 (VDB Entry, Third Party Advisory, vdb-entry)
- security.gentoo.org/glsa/201810-01 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2693 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/11/msg00011.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/201811-13 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2018/dsa-4327 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3403 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2018-20/ (Vendor Advisory)
- www.securitytracker.com/id/1041610 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:2692 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-12379?
- CVE-2018-12379 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-10-18.
- How severe is CVE-2018-12379?
- High severity. CVSS v3 base score is 7.8 out of 10.