Vulnerability · Published Dec 19, 2023 · Assigned by mozilla
CVE-2023-6864
High 8.8
In plain English
A high-severity security flaw 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 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.2%top 31.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. 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 < 115.6, Thunderbird < 115.6, and Firefox < 121.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 115.6.0-1.el8_9.alma | ALSA-2024:0012 |
| AlmaLinux:9 | firefox | 115.6.0-1.el9_3.alma | ALSA-2024:0025 |
| AlmaLinux:9 | firefox-x11 | 115.6.0-1.el9_3.alma | ALSA-2024:0025 |
| AlmaLinux:8 | thunderbird | 115.6.0-1.el8_9.alma | ALSA-2024:0003 |
| AlmaLinux:9 | thunderbird | 115.6.0-1.el9_3.alma | ALSA-2024:0001 |
| Alpine:v3.20 | firefox-esr | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.21 | firefox-esr | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.22 | firefox-esr | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.23 | firefox-esr | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.21 | mozjs | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.22 | mozjs | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.23 | mozjs | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.24 | mozjs | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Alpine:v3.20 | mozjs115 | 115.6.0-r0 | ALPINE-CVE-2023-6864 |
| Debian:12 | firefox-esr | 115.6.0esr-1~deb12u1 | DSA-5581-1 |
| Debian:12 | firefox-esr | 115.6.0esr-1~deb12u1 | DEBIAN-CVE-2023-6864 |
| Debian:13 | firefox-esr | 115.6.0esr-1 | DEBIAN-CVE-2023-6864 |
| Debian:14 | firefox-esr | 115.6.0esr-1 | DEBIAN-CVE-2023-6864 |
| Debian:12 | thunderbird | 1:115.6.0-1~deb12u1 | DSA-5582-1 |
| Debian:12 | thunderbird | 1:115.6.0-1~deb12u1 | DEBIAN-CVE-2023-6864 |
| Debian:13 | thunderbird | 1:115.6.0-1 | DEBIAN-CVE-2023-6864 |
| Debian:14 | thunderbird | 1:115.6.0-1 | DEBIAN-CVE-2023-6864 |
| Rocky Linux:8 | firefox | 0:115.6.0-1.el8_9 | RLSA-2024:0012 |
| Rocky Linux:8 | thunderbird | 0:115.6.0-1.el8_9 | RLSA-2024:0003 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6864 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6864 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-6864 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-6864 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.6.0+build2-0ubuntu0.22.04.1 | USN-6563-1 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.6.0+build2-0ubuntu0.22.04.1 | UBUNTU-CVE-2023-6864 |
| Ubuntu:24.04:LTS | thunderbird | 1:115.6.0+build2-0ubuntu1 | UBUNTU-CVE-2023-6864 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 115.6 |
| Mozilla | Thunderbird | unspecified – before 115.6 |
| Mozilla | Firefox | unspecified – before 121 |
References
- Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
- https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
- https://security.gentoo.org/glsa/202401-10
- https://www.debian.org/security/2023/dsa-5581
- https://www.debian.org/security/2023/dsa-5582
- https://www.mozilla.org/security/advisories/mfsa2023-54/
- https://www.mozilla.org/security/advisories/mfsa2023-55/
- https://www.mozilla.org/security/advisories/mfsa2023-56/