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Fencer Intel
critical 9.8

CVE-2018-12390 json

Mozilla developers and community members reported memory safety bugs present in Firefox 62 and Firefox ESR 60.2.

published 7y ago modified 4mo ago also EUVD-2018-4364

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Mozilla developers and community members reported memory safety bugs present in Firefox 62 and Firefox ESR 60.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

Patch / fix

  • Mozilla Firefox 63
  • Mozilla Firefox ESR 60.3
  • Mozilla Thunderbird 60.3
  • firefox-esr Debian 14, Debian 13, Debian 12 60.3.0esr-1
  • thunderbird Debian 14, Debian 13, Debian 12 1:60.3.0-1

debian advisories DEBIAN-CVE-2018-12390

  • firefox Ubuntu 14.04 LTS 63.0+build2-0ubuntu0.14.04.2
  • firefox Ubuntu 16.04 LTS 63.0+build2-0ubuntu0.16.04.2
  • firefox Ubuntu 18.04 LTS 63.0+build2-0ubuntu0.18.04.2
  • thunderbird Ubuntu 14.04 LTS 1:60.4.0+build2-0ubuntu0.14.04.1
  • thunderbird Ubuntu 16.04 LTS 1:60.4.0+build2-0ubuntu0.16.04.1
  • thunderbird Ubuntu 18.04 LTS 1:60.4.0+build2-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-12390

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • thunderbird RHEL 7 60.3.0-1.el7_5
  • thunderbird RHEL 6 60.3.0-1.el6
  • firefox RHEL 6 60.3.0-1.el6
  • firefox RHEL 7 60.3.0-1.el7_5

red hat advisories RHSA-2018:3532RHSA-2018:3531RHSA-2018:3006RHSA-2018:3005

  • MozillaFirefox SLES 12 SP4, SLES 12 SP3, SLES 12 SP2-BCL +13 more 60.3.0-109.50.2
  • MozillaThunderbird SLE Workstation Extension 15 60.3.0-3.17.2
  • MozillaFirefox SLE Module for Desktop Applications 15 60.3.0-3.17.1

suse advisories SUSE-SU-2018:3749-3SUSE-SU-2018:3749-2SUSE-SU-2018:3769-1SUSE-SU-2018:3749-1SUSE-SU-2018:3656-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 92.0-1.2
  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1
  • MozillaThunderbird Package Hub 12 60.3.0-74.2

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1openSUSE-SU-2024:10601-1openSUSE-SU-2018:3687-1

  • firefox Arch Linux 63.0-1
  • thunderbird Arch Linux 60.3.0-1

arch linux advisories AVG-787AVG-803

Is CVE-2018-12390 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-12390 updated cvss 9.8

Mozilla: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3

  • Red Hat Enterprise Linux Client (v. 7) firefox 60.3.0-1.el7_5, thunderbird 60.3.0-1.el7_5 Red Hat Enterprise Linux Client Optional (v. 7) firefox 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
  • Red Hat Enterprise Linux Desktop (v. 6) firefox 60.3.0-1.el6, thunderbird 60.3.0-1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) firefox 60.3.0-1.el6
    fixed: vendor fix RHSA-2018:3006
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3532
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 60.3.0-1.el6 Red Hat Enterprise Linux Server (v. 6) firefox 60.3.0-1.el6
    fixed: vendor fix RHSA-2018:3006
  • Red Hat Enterprise Linux Server (v. 7) firefox 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
  • Red Hat Enterprise Linux Server Optional (v. 6) firefox 60.3.0-1.el6, thunderbird 60.3.0-1.el6
    fixed: vendor fix RHSA-2018:3006
  • Red Hat Enterprise Linux Server Optional (v. 7) firefox 60.3.0-1.el7_5, thunderbird 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
show 5 more
  • Red Hat Enterprise Linux Workstation (v. 6) firefox 60.3.0-1.el6, thunderbird 60.3.0-1.el6
    fixed: vendor fix RHSA-2018:3006
  • Red Hat Enterprise Linux Workstation (v. 7) firefox 60.3.0-1.el7_5, thunderbird 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
  • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox 60.3.0-1.el6
    fixed: vendor fix RHSA-2018:3006
  • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox 60.3.0-1.el7_5
    fixed: vendor fix RHSA-2018:3005
  • Red Hat Enterprise Linux 8 firefox, thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.21% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Mozilla Firefox
  • Mozilla Firefox ESR
  • Mozilla Thunderbird

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.