Out-of-bounds write in Mozilla Firefox
Priority MEDIUM 52CWE-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, 2 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 118, Firefox ESR 115.3, and Thunderbird 115.3. 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 < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01541 75th percentileScored 2026-11-07
Fix Partial Firefox (Mozilla): 119Firefox ESR (Mozilla): 115.4+1 more productRed Hat: 13 advisoriesRed Hat: 17 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 119 | 119 | Patch available | CNA |
| Mozilla | Firefox ESR | before 115.4 | 115.4 | Patch available | CNA |
| Mozilla | Thunderbird | before 115.4.1 | 115.4.1 | Patch available | CNA |
- Firefox VendorMozilla Affected before 119 Fixed in 119 Patch available CNA
- Firefox ESR VendorMozilla Affected before 115.4 Fixed in 115.4 Patch available CNA
- Thunderbird VendorMozilla Affected before 115.4.1 Fixed in 115.4.1 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 119.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 115.4 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 115.4.1 | 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:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 119.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 115.4 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 115.4.1 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
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 119
- Fix · CNA Firefox ESR (Mozilla) Fixed in 115.4
- Fix · CNA Thunderbird (Mozilla) Fixed in 115.4.1
Red Hat 13 advisories
- RHSA-2023:6194 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 8) thunderbird-115.4.1-1.el8_8
- RHSA-2023:6195 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) thunderbird-115.4.1-1.el8_6
- RHSA-2023:6196 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) thunderbird-115.4.1-1.el8_4
- Red Hat Enterprise Linux AppStream E4S (v.8.4) thunderbird-115.4.1-1.el8_4
- Red Hat Enterprise Linux AppStream TUS (v.8.4) thunderbird-115.4.1-1.el8_4
Show 10 more Red Hat advisories
- RHSA-2023:6199 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.9.0) firefox-115.4.0-1.el9_0
- RHSA-2023:6197 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) thunderbird-115.4.1-1.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) thunderbird-115.4.1-1.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) thunderbird-115.4.1-1.el8_2
- RHSA-2023:6198 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) thunderbird-115.4.1-1.el8_1
- RHSA-2023:6187 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-115.4.0-1.el8_8
- RHSA-2023:6191 Released 2023-10-30 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux AppStream (v. 9) thunderbird-115.4.1-1.el9_2
- RHSA-2023:6189 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream E4S (v. 8.1) firefox-115.4.0-1.el8_1
- RHSA-2023:6186 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream EUS (v.8.6) firefox-115.4.0-1.el8_6
- RHSA-2023:6188 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream (v. 9) firefox-115.4.0-1.el9_2, firefox-x11-115.4.0-1.el9_2
- RHSA-2023:6185 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-115.4.0-1.el8_2
- Red Hat Enterprise Linux AppStream E4S (v. 8.2) firefox-115.4.0-1.el8_2
- Red Hat Enterprise Linux AppStream TUS (v. 8.2) firefox-115.4.0-1.el8_2
- RHSA-2023:6162 Released 2023-10-30 · Red Hat rating Importantfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-115.4.0-1.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-115.4.0-1.el7_9
- Red Hat Enterprise Linux Server (v. 7) firefox-115.4.0-1.el7_9
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-115.4.0-1.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) firefox-115.4.0-1.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-115.4.0-1.el7_9
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 119
11 records Highest priority Priority MEDIUM 4 MEDIUM, 7 LOW
Other records, highest priority first
- TI-2023-05274 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 44
- TI-2023-05271 Use after free in Mozilla FirefoxPriority MEDIUM 42
- TI-2023-05267 Uncontrolled resource consumption in Mozilla FirefoxPriority MEDIUM 42
- Release ·
Mozilla Firefox ESR, Thunderbird 115.4, 115.4.1
8 records Highest priority Priority MEDIUM 3 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2023-05271 Use after free in Mozilla FirefoxPriority MEDIUM 42
- TI-2023-05267 Uncontrolled resource consumption in Mozilla FirefoxPriority MEDIUM 42
- TI-2023-05275 Address bar spoofing via bidirectional charactersPriority LOW 31
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 7 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:6187, RHSA-2023:6194 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:6188, RHSA-2023:6191 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2023:6185, RHSA-2023:6197 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2023:6196 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.1) | Fixed | RHSA-2023:6189, RHSA-2023:6198 |
| Red Hat Enterprise Linux AppStream E4S (v. 8.2) | Fixed | RHSA-2023:6185, RHSA-2023:6197 |
| Red Hat Enterprise Linux AppStream E4S (v.8.4) | Fixed | RHSA-2023:6196 |
| Red Hat Enterprise Linux AppStream EUS (v.8.6) | Fixed | RHSA-2023:6186, RHSA-2023:6195 |
| Red Hat Enterprise Linux AppStream EUS (v.9.0) | Fixed | RHSA-2023:6199 |
| Red Hat Enterprise Linux AppStream TUS (v. 8.2) | Fixed | RHSA-2023:6185, RHSA-2023:6197 |
| Red Hat Enterprise Linux AppStream TUS (v.8.4) | Fixed | RHSA-2023:6196 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2023:6162 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2023:6162 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2023:6162 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2023:6162 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2023:6162 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2023:6162 |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-5730
- 2026-10-03 Alias added: GHSA-hwgx-3qq3-2885
References
Advisory 8
- Memory safety bugs fixed in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4.1
- https://www.mozilla.org/security/advisories/mfsa2023-45/
- https://www.mozilla.org/security/advisories/mfsa2023-46/
- https://www.mozilla.org/security/advisories/mfsa2023-47/
- https://www.debian.org/security/2023/dsa-5535
- https://lists.debian.org/debian-lts-announce/2023/10/msg00037.html
- https://www.debian.org/security/2023/dsa-5538
- https://lists.debian.org/debian-lts-announce/2023/10/msg00042.html
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-2023-5730 · CVE Program
- CVE-2023-5730 · NVD
- FIRST EPSS
- GHSA-hwgx-3qq3-2885 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-5730 · 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