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TI-2018-03658 Aliases CVE-2018-5091GHSA-27h4-qjq2-62v3

Use after free in Mozilla Firefox ESR

Priority MEDIUM 48CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Firefox < 58.

Why it matters now

EPSS 0.03283 88th percentileScored 2026-11-07
Fix Fixed Firefox ESR (Mozilla): 52.6Firefox (Mozilla): 58Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox ESRbefore 52.652.6Patch availableCNA
MozillaFirefoxbefore 5858Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 52.6 Fixed in 52.6 Patch available CNA
  • Firefox VendorMozilla Affected before 58 Fixed in 58 Patch available CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 58.0; before 52.6.0VulnerableMozilla
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 58.0; before 52.6.0 Vulnerable ·Mozilla
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 52.6
  • Fix · CNA Firefox (Mozilla) Fixed in 58

Red Hat 1 advisory

  • RHSA-2018:0122 Released 2018-01-24 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-52.6.0-1.el7_4
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-52.6.0-1.el7_4
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux Server (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-52.6.0-1.el7_4
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-52.6.0-1.el6_9, firefox-52.6.0-1.el6_9.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-52.6.0-1.el7_4, firefox-52.6.0-1.el7_4.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-52.6.0-1.el7_4
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-52.6.0-1.el6_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-52.6.0-1.el7_4
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-52.6.0-1.el7_4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Mozilla Firefox, Firefox ESR — USN-3544-1

    30 records Highest priority Priority MEDIUM 16 MEDIUM, 14 LOW

    Other records, highest priority first

    • TI-2018-03671 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03669 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03664 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    Show all 30 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2018:0122

    11 records Highest priority Priority MEDIUM 10 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-03671 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03669 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03664 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    Show all 11 records → Advisory →
Show 2 more groups
  • Advisory ·

    Mozilla Firefox, Firefox ESR — DSA-4096

    11 records Highest priority Priority MEDIUM 10 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-03671 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03669 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03664 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    Show all 11 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — DSA-4102

    11 records Highest priority Priority MEDIUM 10 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-03671 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03669 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    • TI-2018-03664 Use after free in Mozilla ThunderbirdPriority MEDIUM 52
    Show all 11 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:0122
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:0122
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:0122
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-5091
  2. 2026-10-03 Alias added: GHSA-27h4-qjq2-62v3

References

Advisory 8

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences