Vulnerability in Mozilla Firefox
CVE-2024-4367
A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
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: 0.707 (99.4th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.707 · newest: 0.707 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Open-Xchange Appsuite Frontend — versions 7.10.6
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
- LOURC0D3/CVE-2024-4367-PoC
- s4vvysec/CVE-2024-4367-POC
- Zombie-Kaiser/cve-2024-4367-PoC-fixed
- spaceraccoon/detect-cve-2024-4367
- snyk-labs/pdfjs-vuln-demo
- UnHackerEnCapital/PDFernetRemotelo
- Masamuneee/CVE-2024-4367-Analysis
- clarkio/pdfjs-vuln-demo
- exfil0/WEAPONIZING-CVE-2024-4367
- 1337rokudenashi/Odoo_PDFjs_CVE-2024-4367.pdf
References
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2024-21/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-22/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-23/ (Vendor Advisory)
- lists.debian.org/debian-lts-announce/2024/05/msg00010.html (Mailing List)
- lists.debian.org/debian-lts-announce/2024/05/msg00012.html (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-4367?
- CVE-2024-4367 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 8.8/10. Published 2024-05-14.
- How severe is CVE-2024-4367?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2024-4367 known to be exploited?
- 61 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.