Vulnerability · Published Sep 27, 2023 · Assigned by mozilla
CVE-2023-5176
Critical 9.8
In plain English
A critical-severity out-of-bounds write in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Memory safety bugs present in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2. 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 < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | firefox | 115.3.1-1.el9_2.alma.1 | ALSA-2023:5434 |
| AlmaLinux:9 | firefox-x11 | 115.3.1-1.el9_2.alma.1 | ALSA-2023:5434 |
| AlmaLinux:9 | thunderbird | 115.3.1-1.el9_2.alma | ALSA-2023:5435 |
| Alpine:v3.20 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5176 |
| Alpine:v3.21 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5176 |
| Alpine:v3.22 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5176 |
| Alpine:v3.23 | firefox-esr | 115.3.0-r0 | ALPINE-CVE-2023-5176 |
| Debian:12 | firefox-esr | 115.3.0esr-1~deb12u1 | DEBIAN-CVE-2023-5176 |
| Debian:12 | firefox-esr | 115.3.0esr-1~deb12u1 | DSA-5506-1 |
| Debian:13 | firefox-esr | 115.3.0esr-1 | DEBIAN-CVE-2023-5176 |
| Debian:14 | firefox-esr | 115.3.0esr-1 | DEBIAN-CVE-2023-5176 |
| Debian:12 | thunderbird | 1:115.3.1-1~deb12u1 | DEBIAN-CVE-2023-5176 |
| Debian:12 | thunderbird | 1:115.3.1-1~deb12u1 | DSA-5513-1 |
| Debian:13 | thunderbird | 1:115.3.0-1 | DEBIAN-CVE-2023-5176 |
| Debian:14 | thunderbird | 1:115.3.0-1 | DEBIAN-CVE-2023-5176 |
| Rocky Linux:8 | thunderbird | 0:115.3.1-1.el8_8 | RLSA-2023:5428 |
| Rocky Linux:9 | thunderbird | 0:115.3.1-1.el9_2 | RLSA-2023:5435 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5176 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-5176 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-5176 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-5176 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.22.04.2 | UBUNTU-CVE-2023-5176 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.22.04.2 | USN-6405-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 118 |
| Mozilla | Firefox ESR | unspecified – before 115.3 |
| Mozilla | Thunderbird | unspecified – before 115.3 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- Memory safety bugs fixed in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3
- https://www.mozilla.org/security/advisories/mfsa2023-41/
- https://www.mozilla.org/security/advisories/mfsa2023-42/
- https://www.mozilla.org/security/advisories/mfsa2023-43/
- https://www.debian.org/security/2023/dsa-5506
- https://lists.debian.org/debian-lts-announce/2023/09/msg00034.html
- https://www.debian.org/security/2023/dsa-5513
- https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html