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TI-2019-12707 Aliases CVE-2019-17024GHSA-r596-hj6g-g56c

Out-of-bounds write in Mozilla Firefox ESR

Priority MEDIUM 43CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 15 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

Mozilla developers reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Why it matters now

EPSS 0.02455 84th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Firefox ESR (Mozilla): 68.4Firefox (Mozilla): 72Red Hat: 8 advisoriesRed Hat: 15 fixed, 1 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox ESRbefore 68.468.4Patch availableCNA
MozillaFirefoxbefore 7272Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 68.4 Fixed in 68.4 Patch available CNA
  • Firefox VendorMozilla Affected before 72 Fixed in 72 Patch available CNA

CPE configurations NVD · 27

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 72.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 68.4VulnerableMozilla
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*19.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*19.10VulnerableCanonical
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:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 72.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 68.4 Vulnerable ·Mozilla
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* 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:19.04:*:*:*:*:*:*:* Versions 19.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
  • 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:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
Show 17 more CPE
CPEVersionsRoleVendor
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_eus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*8.1VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*8.4VulnerableRed 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:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*8.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*8.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*8.4VulnerableRed 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:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • 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_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:* Versions 8.1 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* Versions 8.4 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:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* Versions 8.4 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:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 68.4
  • Fix · CNA Firefox (Mozilla) Fixed in 72

Red Hat 8 advisories

  • RHSA-2020:0295 Released 2020-01-30 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) firefox-68.4.1-1.el8_0
  • RHSA-2020:0292 Released 2020-01-30 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.0) thunderbird-68.4.1-2.el8_0
  • RHSA-2020:0127 Released 2020-01-16 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-68.4.1-2.el8_1
Show 5 more Red Hat advisories
  • RHSA-2020:0120 Released 2020-01-16 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-68.4.1-2.el7_7
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-68.4.1-2.el7_7
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-68.4.1-2.el7_7
  • RHSA-2020:0123 Released 2020-01-16 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Desktop (v. 6) thunderbird-68.4.1-2.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-68.4.1-2.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) thunderbird-68.4.1-2.el6_10
  • RHSA-2020:0111 Released 2020-01-14 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-68.4.1-1.el8_1
  • RHSA-2020:0085 Released 2020-01-13 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-68.4.1-1.el7_7
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-68.4.1-1.el7_7
    • Red Hat Enterprise Linux Server (v. 7) firefox-68.4.1-1.el7_7
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-68.4.1-1.el7_7
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-68.4.1-1.el7_7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-68.4.1-1.el7_7
  • RHSA-2020:0086 Released 2020-01-13 · Red Hat rating Critical
    firefox security update
    • Red Hat Enterprise Linux Desktop (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux Server (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux Server Optional (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux Workstation (v. 6) firefox-68.4.1-1.el6_10
    • Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-68.4.1-1.el6_10

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-4241-1

    10 records Highest priority Priority MEDIUM 6 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-08802 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 44
    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
    Show all 10 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0292

    9 records Highest priority Priority MEDIUM 5 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
    • TI-2019-12691 Use after free in Mozilla ThunderbirdPriority MEDIUM 42
    Show all 9 records → Advisory →
Show 12 more groups
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0295

    9 records Highest priority Priority MEDIUM 5 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12695 Out-of-bounds write in Mozilla ThunderbirdPriority MEDIUM 42
    • TI-2019-12691 Use after free in Mozilla ThunderbirdPriority MEDIUM 42
    Show all 9 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — USN-4234-1

    7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12708 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 41
    • TI-2019-12706 Improper authentication in Mozilla FirefoxPriority LOW 32
    Show all 7 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — openSUSE-SU-2020:0060

    6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12698 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 42
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 6 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — openSUSE-SU-2020:0094

    6 records Highest priority Priority MEDIUM 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12698 Out-of-bounds write in Mozilla Firefox ESRPriority MEDIUM 42
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 6 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0085

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0086

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0111

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0120

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0123

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — RHSA-2020:0127

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — DSA-4600

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →
  • Advisory ·

    Mozilla Firefox, Firefox ESR — DSA-4603

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2019-12700 Type confusion in Mozilla Firefox ESRPriority MEDIUM 43
    • TI-2019-12705 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    • TI-2019-12699 Cross-site scripting in Mozilla Firefox ESRPriority LOW 31
    Show all 4 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:0111, RHSA-2020:0127
Red Hat Enterprise Linux AppStream E4S (v. 8.0)Fixed RHSA-2020:0292, RHSA-2020:0295
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:0085, RHSA-2020:0120
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:0085
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2020:0086, RHSA-2020:0123
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2020:0086
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2020:0086
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2020:0086
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:0085
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2020:0086, RHSA-2020:0123
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:0085, RHSA-2020:0120
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2020:0086, RHSA-2020:0123
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:0085, RHSA-2020:0120
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2020:0086
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:0085

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-17024
  2. 2026-10-03 Alias added: GHSA-r596-hj6g-g56c

References

Exploit 1

Advisory 24

  • 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