Read the docs
TI-2018-13077 Aliases CVE-2018-18493GHSA-hr83-78x9-4cjp

Memory corruption in Mozilla Thunderbird

Priority MEDIUM 50CWE-119Published · 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-119 and the CVSS impact.

Summary

A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

Why it matters now

EPSS 0.04975 92nd percentileScored 2026-11-07
Fix Fixed Thunderbird (Mozilla): 60.4Firefox ESR (Mozilla): 60.4+1 more productRed Hat: 4 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 60.460.4Patch availableCNA
MozillaFirefox ESRbefore 60.460.4Patch availableCNA
MozillaFirefoxbefore 6464Patch availableCNA
  • Thunderbird VendorMozilla Affected before 60.4 Fixed in 60.4 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 60.4 Fixed in 60.4 Patch available CNA
  • Firefox VendorMozilla Affected before 64 Fixed in 64 Patch available CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 60.4.0; before 64.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 60.4.0VulnerableMozilla
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: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:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
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:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.4.0; before 64.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.4.0 Vulnerable ·Mozilla
  • 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: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:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • 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
Show 7 more CPE
CPEVersionsRoleVendor
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:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed 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: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:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 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

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 60.4
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 60.4
  • Fix · CNA Firefox (Mozilla) Fixed in 64

Red Hat 4 advisories

  • RHSA-2019:0159 Released 2019-01-24 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.4.0-1.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.4.0-1.el6
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.4.0-1.el6
  • RHSA-2019:0160 Released 2019-01-24 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-60.4.0-1.el7_6
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.4.0-1.el7_6
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.4.0-1.el7_6
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.4.0-1.el7_6
  • RHSA-2018:3833 Released 2018-12-17 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux Server (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.4.0-1.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.4.0-1.el7
Show 1 more Red Hat advisories
  • RHSA-2018:3831 Released 2018-12-17 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux Server (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-60.4.0-1.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.4.0-1.el6

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 64

    10 records Highest priority Priority MEDIUM 7 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2018-13076 Use after free in Mozilla ThunderbirdPriority MEDIUM 54
    • TI-2018-13082 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 49
    • TI-2018-08906 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
    Show all 10 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 60.4

    5 records Highest priority Priority MEDIUM 4 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2018-13076 Use after free in Mozilla ThunderbirdPriority MEDIUM 54
    • TI-2018-13082 Integer overflow in Mozilla ThunderbirdPriority MEDIUM 49
    • TI-2018-08904 Memory corruption in Mozilla ThunderbirdPriority MEDIUM 48
    Show all 5 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3833, RHSA-2019:0160
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3833
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2018:3831, RHSA-2019:0159
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2018:3831
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2018:3831
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2018:3831
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3833
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2018:3831, RHSA-2019:0159
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3833, RHSA-2019:0160
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2018:3831, RHSA-2019:0159
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3833, RHSA-2019:0160
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2018:3831
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3833
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3833
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2019:0160
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-18493
  2. 2026-10-03 Alias added: GHSA-hr83-78x9-4cjp

References

Advisory 14

  • 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