Buffer overflow in Mozilla Firefox
CVE-2024-8387
Memory safety bugs present in Firefox 129, Firefox ESR 128.1, and Thunderbird 128.1. 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 < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.
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: 0.006 (46.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified, 129.0
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr — versions 128.1
- Mozilla Thunderbird — versions unspecified, 128.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/buglist.cgi (Broken Link)
- www.mozilla.org/security/advisories/mfsa2024-39/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-40/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-43/
Frequently asked questions
- What is CVE-2024-8387?
- CVE-2024-8387 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2024-09-03.
- How severe is CVE-2024-8387?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2024-8387 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.