Buffer overflow in Mozilla Firefox
CVE-2023-4056
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. 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 < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (60.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Debian Linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
References
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Broken Link)
- www.mozilla.org/security/advisories/mfsa2023-29/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-30/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-31/ (Vendor Advisory)
- www.debian.org/security/2023/dsa-5464 (Mailing List, Third Party Advisory)
- www.debian.org/security/2023/dsa-5469 (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/08/msg00008.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/08/msg00010.html (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-4056?
- CVE-2023-4056 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-08-01.
- How severe is CVE-2023-4056?
- Critical severity. CVSS v3 base score is 9.8 out of 10.