Buffer overflow in Mozilla Firefox
CVE-2020-6814
Mozilla developers reported memory safety bugs present in Firefox and Thunderbird 68.5. 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 Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.
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: 0.019 (78.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · 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)
References
- www.mozilla.org/security/advisories/mfsa2020-08/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-10/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-09/ (Vendor Advisory)
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Vendor Advisory)
- usn.ubuntu.com/4328-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4335-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-6814?
- CVE-2020-6814 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-03-25.
- How severe is CVE-2020-6814?
- Critical severity. CVSS v3 base score is 9.8 out of 10.