Use after free in Mozilla Firefox
Priority MEDIUM 41CWE-416Published · 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: 17 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
Cross-compartment wrappers wrapping a scripted proxy could have caused objects from other compartments to be stored in the main compartment resulting in a use-after-free. This vulnerability affects Firefox < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00755 55th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 115Firefox ESR (Mozilla): 102.13+1 more productRed Hat: 16 advisoriesRed Hat: 17 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 115 | 115 | Patch available | CNA |
| Mozilla | Firefox ESR | before 102.13 | 102.13 | Patch available | CNA |
| Mozilla | Thunderbird | before 102.13 | 102.13 | Patch available | CNA |
- Firefox VendorMozilla Affected before 115 Fixed in 115 Patch available CNA
- Firefox ESR VendorMozilla Affected before 102.13 Fixed in 102.13 Patch available CNA
- Thunderbird VendorMozilla Affected before 102.13 Fixed in 102.13 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 115.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 102.13 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 102.13 | Vulnerable | Mozilla |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Debian |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 115.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 102.13 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 102.13 Vulnerable ·Mozilla
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 115
- Fix · CNA Firefox ESR (Mozilla) Fixed in 102.13
- Fix · CNA Thunderbird (Mozilla) Fixed in 102.13
Red Hat 16 advisories
- RHSA-2023:4079 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-102.13.0-2.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-102.13.0-2.el7_9
- Red Hat Enterprise Linux Server (v. 7) firefox-102.13.0-2.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-102.13.0-2.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) firefox-102.13.0-2.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-102.13.0-2.el7_9
- RHSA-2023:4076 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-102.13.0-2.el8_8
- RHSA-2023:4075 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) firefox-102.13.0-2.el8_4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) firefox-102.13.0-2.el8_4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) firefox-102.13.0-2.el8_4
Show 13 more Red Hat advisories
- RHSA-2023:4074 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-102.13.0-2.el8_4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-102.13.0-2.el8_4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-102.13.0-2.el8_4
- RHSA-2023:4066 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) thunderbird-102.13.0-2.el9_0
- RHSA-2023:4073 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-102.13.0-2.el9_0
- RHSA-2023:4072 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-102.13.0-2.el8_1
- RHSA-2023:4071 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 9) firefox-102.13.0-2.el9_2, firefox-x11-102.13.0-2.el9_2
- RHSA-2023:4069 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-102.13.0-2.el8_6
- RHSA-2023:4067 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-102.13.0-2.el8_6
- RHSA-2023:4065 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-102.13.0-2.el8_1
- RHSA-2023:4068 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-102.13.0-2.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-102.13.0-2.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-102.13.0-2.el8_2
- RHSA-2023:4063 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-102.13.0-2.el8_8
- RHSA-2023:4070 Released 2023-07-13 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-102.13.0-2.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox-102.13.0-2.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox-102.13.0-2.el8_2
- RHSA-2023:4062 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-102.13.0-2.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-102.13.0-2.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-102.13.0-2.el7_9
- RHSA-2023:4064 Released 2023-07-13 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 9) thunderbird-102.13.0-2.el9_2
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 115
13 records Highest priority Priority HIGH 2 HIGH, 3 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2023-18834 Use after free in Mozilla FirefoxPriority HIGH 73
- TI-2023-18841 Unrestricted file upload in Mozilla FirefoxPriority HIGH 69
- TI-2023-18840 A website could have obscured the fullscreen notification by using a URL with a scheme…Priority MEDIUM 62
- Release ·
Mozilla Firefox ESR, Thunderbird 102.13
5 records Highest priority Priority HIGH 2 HIGH, 3 MEDIUM
Other records, highest priority first
- TI-2023-18834 Use after free in Mozilla FirefoxPriority HIGH 73
- TI-2023-18841 Unrestricted file upload in Mozilla FirefoxPriority HIGH 69
- TI-2023-18840 A website could have obscured the fullscreen notification by using a URL with a scheme…Priority MEDIUM 62
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:4063, RHSA-2023:4076 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:4064, RHSA-2023:4071 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2023:4068, RHSA-2023:4070 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2023:4074, RHSA-2023:4075 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.1) | Fixed | RHSA-2023:4065, RHSA-2023:4072 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.2) | Fixed | RHSA-2023:4068, RHSA-2023:4070 |
| Red Hat Enterprise Linux AppStream E4S (v.8.4) | Fixed | RHSA-2023:4074, RHSA-2023:4075 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2023:4067, RHSA-2023:4069 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2023:4066, RHSA-2023:4073 |
| Red Hat Enterprise Linux AppStream TUS (v. 8.2) | Fixed | RHSA-2023:4068, RHSA-2023:4070 |
| Red Hat Enterprise Linux AppStream TUS (v.8.4) | Fixed | RHSA-2023:4074, RHSA-2023:4075 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2023:4062, RHSA-2023:4079 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2023:4079 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2023:4079 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2023:4062, RHSA-2023:4079 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2023:4062, RHSA-2023:4079 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2023:4079 |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-37202
- 2026-10-03 Alias added: GHSA-hhm4-xgvr-x3rg
References
Advisory 6
- https://www.mozilla.org/security/advisories/mfsa2023-22/
- https://www.mozilla.org/security/advisories/mfsa2023-23/
- https://www.mozilla.org/security/advisories/mfsa2023-24/
- https://lists.debian.org/debian-lts-announce/2023/07/msg00006.html
- https://www.debian.org/security/2023/dsa-5450
- https://www.debian.org/security/2023/dsa-5451
More Mozilla Firefox vulnerabilities
- 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
Sources
- CVE-2023-37202 · CVE Program
- CVE-2023-37202 · NVD
- FIRST EPSS
- GHSA-hhm4-xgvr-x3rg · GitHub Advisory Database · CC BY 4.0
- CVE-2023-37202 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences