Buffer overflow in Mozilla Firefox
CVE-2023-6864
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.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.012 (67.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Broken Link)
- lists.debian.org/debian-lts-announce/2023/12/msg00020.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/12/msg00021.html (Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202401-10 (Third Party Advisory)
- www.debian.org/security/2023/dsa-5581 (Third Party Advisory)
- www.debian.org/security/2023/dsa-5582 (Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2023-54/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-55/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-56/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-6864?
- CVE-2023-6864 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-12-19.
- How severe is CVE-2023-6864?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-6864 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.