Vulnerability in Mozilla Firefox
CVE-2020-12406
Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
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: 0.010 (62.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2020-20/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-21/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-22/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- usn.ubuntu.com/4421-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12406?
- CVE-2020-12406 is a high-severity vulnerability in Mozilla Firefox, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2020-07-09.
- How severe is CVE-2020-12406?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-12406 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.