Vulnerability · Published Nov 21, 2023 · Assigned by mozilla
CVE-2023-6204
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 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.8%top 41.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
On some systems—depending on the graphics settings and drivers—it was possible to force an out-of-bounds read and leak memory data into the images created on the canvas element. 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-2023-6204 |
| Alpine:v3.21 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.22 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.23 | firefox-esr | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.20 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.21 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.22 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Alpine:v3.23 | thunderbird | 115.5.0-r0 | ALPINE-CVE-2023-6204 |
| Debian:12 | firefox-esr | 115.5.0esr-1~deb12u1 | DSA-5561-1 |
| Debian:12 | firefox-esr | 115.5.0esr-1~deb12u1 | DEBIAN-CVE-2023-6204 |
| Debian:13 | firefox-esr | 115.5.0esr-1 | DEBIAN-CVE-2023-6204 |
| Debian:14 | firefox-esr | 115.5.0esr-1 | DEBIAN-CVE-2023-6204 |
| Debian:12 | thunderbird | 1:115.5.0-1~deb12u1 | DSA-5566-1 |
| Debian:12 | thunderbird | 1:115.5.0-1~deb12u1 | DEBIAN-CVE-2023-6204 |
| Debian:13 | thunderbird | 1:115.5.0-1 | DEBIAN-CVE-2023-6204 |
| Debian:14 | thunderbird | 1:115.5.0-1 | DEBIAN-CVE-2023-6204 |
| Rocky Linux:8 | thunderbird | 0:115.5.0-1.el8_9 | RLSA-2023:7500 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6204 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2023-6204 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2023-6204 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2023-6204 |
| 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-2023-6204 |
| Ubuntu:24.04:LTS | thunderbird | 1:115.5.0+build1-0ubuntu1 | UBUNTU-CVE-2023-6204 |
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=1841050
- 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