Buffer overflow in Mozilla Firefox
CVE-2020-12395
Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. 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 ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
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: 0.025 (84.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.025 · change: +0.003
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/mfsa2020-18/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-16/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-17/ (Vendor Advisory)
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Broken Link)
- usn.ubuntu.com/4373-1/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202005-03 (Third Party Advisory)
- security.gentoo.org/glsa/202005-04 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12395?
- CVE-2020-12395 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-05-26.
- How severe is CVE-2020-12395?
- Critical severity. CVSS v3 base score is 9.8 out of 10.