Vulnerability · Published Nov 21, 2023 · Assigned by mozilla
CVE-2023-6205
Medium 6.5
In plain English
A medium-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 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.9%top 40.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 115.5.0-1.el8_9.alma.1 | ALSA-2023:7508 |
| AlmaLinux:9 | firefox | 115.5.0-1.el9_3.alma.1 | ALSA-2023:7507 |
| AlmaLinux:9 | firefox-x11 | 115.5.0-1.el9_3.alma.1 | ALSA-2023:7507 |
| AlmaLinux:8 | thunderbird | 115.5.0-1.el8_9.alma.1 | ALSA-2023:7500 |
| AlmaLinux:9 | thunderbird | 115.5.0-1.el9_3.alma | ALSA-2023:7501 |
| Alpine:v3.20 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.21 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.22 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.23 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.20 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.21 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.22 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Alpine:v3.23 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6205 |
| Debian:12 | firefox-esr | 115.5.0esr-1~deb12u1 | DSA-5561-1 |
| Debian:12 | firefox-esr | 115.5.0esr-1~deb12u1 | DEBIAN-CVE-2023-6205 |
| Debian:13 | firefox-esr | 115.5.0esr-1 | DEBIAN-CVE-2023-6205 |
| Debian:14 | firefox-esr | 115.5.0esr-1 | DEBIAN-CVE-2023-6205 |
| Debian:12 | thunderbird | 1:115.5.0-1~deb12u1 | DSA-5566-1 |
| Debian:12 | thunderbird | 1:115.5.0-1~deb12u1 | DEBIAN-CVE-2023-6205 |
| Debian:13 | thunderbird | 1:115.5.0-1 | DEBIAN-CVE-2023-6205 |
| Debian:14 | thunderbird | 1:115.5.0-1 | DEBIAN-CVE-2023-6205 |
| Rocky Linux:8 | thunderbird | 0:115.5.0-1.el8_9 | RLSA-2023:7500 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6205 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6205 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-6205 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-6205 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.5.0+build1-0ubuntu0.22.04.1 | USN-6515-1 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.5.0+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2023-6205 |
| Ubuntu:24.04:LTS | thunderbird | 1:115.5.0+build1-0ubuntu1 | UBUNTU-CVE-2023-6205 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 120 |
| Mozilla | Firefox ESR | unspecified – before 115.5.0 |
| Mozilla | Thunderbird | unspecified – before 115.5 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1854076
- https://www.mozilla.org/security/advisories/mfsa2023-49/
- https://www.mozilla.org/security/advisories/mfsa2023-50/
- https://www.mozilla.org/security/advisories/mfsa2023-52/
- https://www.debian.org/security/2023/dsa-5561
- https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
- https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html