Buffer overflow in Mozilla Firefox
CVE-2019-11764
Mozilla developers and community members reported memory safety bugs present in Firefox 69 and Firefox ESR 68.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
Vulnerability class: Buffer Overflow
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: 0.015 (73.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Mozilla Firefox — versions before 70
- Mozilla Firefox Esr — versions before 68.2
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions before 68.2
- Canonical Ubuntu Linux — versions 16.04
Weakness classification (CWE)
References
- bugzilla.mozilla.org/buglist.cgi (Exploit, Issue Tracking, Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-35/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-33/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-34/ (Vendor Advisory)
- security.gentoo.org/glsa/202003-10 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4335-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11764?
- CVE-2019-11764 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2020-01-08.
- How severe is CVE-2019-11764?
- High severity. CVSS v3 base score is 8.8 out of 10.