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TI-2023-17243 Aliases CVE-2023-34416GHSA-94qw-3pc5-wwcm

Out-of-bounds write in Mozilla Firefox ESR

Priority MEDIUM 44CWE-787Published · 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
Partial Red Hat: 17 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

Memory safety bugs present in Firefox 113, Firefox ESR 102.11, and Thunderbird 102.12. 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 < 102.12, Firefox < 114, and Thunderbird < 102.12.

Why it matters now

EPSS 0.0093 60th percentileScored 2026-11-07
Fix Partial Firefox ESR (Mozilla): 102.12Firefox (Mozilla): 114+1 more productRed Hat: 16 advisoriesRed Hat: 17 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 102.12102.12Patch availableCNA
MozillaFirefoxbefore 114114Patch availableCNA
MozillaThunderbirdbefore 102.12102.12Patch availableCNA
  • Firefox ESR VendorMozilla Affected before 102.12 Fixed in 102.12 Patch available CNA
  • Firefox VendorMozilla Affected before 114 Fixed in 114 Patch available CNA
  • Thunderbird VendorMozilla Affected before 102.12 Fixed in 102.12 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*before 114.0VulnerableMozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 102.12VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 102.12VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 114.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 102.12 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 102.12 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Firefox ESR (Mozilla) Fixed in 102.12
  • Fix · CNA Firefox (Mozilla) Fixed in 114
  • Fix · CNA Thunderbird (Mozilla) Fixed in 102.12

Red Hat 16 advisories

  • RHSA-2023:3596 Released 2023-06-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-102.12.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-102.12.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-102.12.0-1.el8_4
  • RHSA-2023:3597 Released 2023-06-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-102.12.0-1.el8_4
    • Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-102.12.0-1.el8_4
    • Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-102.12.0-1.el8_4
  • RHSA-2023:3590 Released 2023-06-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-102.12.0-1.el8_8
Show 13 more Red Hat advisories
  • RHSA-2023:3588 Released 2023-06-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.12.0-1.el8_8
  • RHSA-2023:3589 Released 2023-06-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 9) firefox-102.12.0-1.el9_2, firefox-x11-102.12.0-1.el9_2
  • RHSA-2023:3587 Released 2023-06-14 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.12.0-1.el9_2
  • RHSA-2023:3579 Released 2023-06-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-102.12.0-1.el7_9
  • RHSA-2023:3578 Released 2023-06-14 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-102.12.0-1.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox-102.12.0-1.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox-102.12.0-1.el8_2
  • RHSA-2023:3566 Released 2023-06-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-102.12.0-1.el8_6
  • RHSA-2023:3560 Released 2023-06-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-102.12.0-1.el8_6
  • RHSA-2023:3563 Released 2023-06-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.12.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.12.0-1.el7_9
  • RHSA-2023:3567 Released 2023-06-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-102.12.0-1.el9_0
  • RHSA-2023:3562 Released 2023-06-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-102.12.0-1.el9_0
  • RHSA-2023:3565 Released 2023-06-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-102.12.0-1.el8_2
    • Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-102.12.0-1.el8_2
    • Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-102.12.0-1.el8_2
  • RHSA-2023:3561 Released 2023-06-13 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-102.12.0-1.el8_1
  • RHSA-2023:3564 Released 2023-06-13 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.12.0-1.el8_1

Fixed in the same release

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

  • Release ·

    Mozilla Firefox 114

    4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2023-17244 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 50
    • TI-2023-17242 Open redirect in Mozilla FirefoxPriority LOW 27
    • TI-2023-17241 Improper certificate validation in Mozilla Firefox ESRPriority LOW 17
    Show all 4 records →
  • Release ·

    Mozilla Firefox ESR, Thunderbird 102.12

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2023-17241 Improper certificate validation in Mozilla Firefox ESRPriority LOW 17
    Show all 2 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:3588, RHSA-2023:3590
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:3587, RHSA-2023:3589
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2023:3565, RHSA-2023:3578
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2023:3596, RHSA-2023:3597
Red Hat Enterprise Linux AppStream E4S (v. 8.1)Fixed RHSA-2023:3561, RHSA-2023:3564
Red Hat Enterprise Linux AppStream E4S (v. 8.2)Fixed RHSA-2023:3565, RHSA-2023:3578
Red Hat Enterprise Linux AppStream E4S (v.8.4)Fixed RHSA-2023:3596, RHSA-2023:3597
Red Hat Enterprise Linux AppStream EUS (v.8.6)Fixed RHSA-2023:3560, RHSA-2023:3566
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:3562, RHSA-2023:3567
Red Hat Enterprise Linux AppStream TUS (v. 8.2)Fixed RHSA-2023:3565, RHSA-2023:3578
Red Hat Enterprise Linux AppStream TUS (v.8.4)Fixed RHSA-2023:3596, RHSA-2023:3597
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:3563, RHSA-2023:3579
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:3579
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:3579
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2023:3563, RHSA-2023:3579
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:3563, RHSA-2023:3579
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2023:3579

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-34416
  2. 2026-10-03 Alias added: GHSA-94qw-3pc5-wwcm

References

Advisory 3

Other 3

  • 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