Buffer overflow in Mozilla Firefox
CVE-2023-6212
Memory safety bugs present in Firefox 119, Firefox ESR 115.4, and Thunderbird 115.4. 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 < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Vulnerability class: Buffer Overflow
EPSS: 0.008 (53.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox_esr
- Mozilla Thunderbird — versions unspecified
- Debian Debian_linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
References
- security@mozilla.org (Broken Link)
- security@mozilla.org (Release Notes, Vendor Advisory)
- security@mozilla.org (Release Notes, Vendor Advisory)
- security@mozilla.org (Release Notes, Vendor Advisory)
- security@mozilla.org (Third Party Advisory)
- security@mozilla.org (Mailing List)
- security@mozilla.org
Frequently asked questions
- What is CVE-2023-6212?
- CVE-2023-6212 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-11-21.
- How severe is CVE-2023-6212?
- High severity. CVSS v3 base score is 8.8 out of 10.