Buffer overflow in Mozilla Firefox
CVE-2019-11758
Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed. This bug showed evidence of memory corruption in the accessibility engine and we presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, 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: 0.013 (70.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Mozilla Firefox — versions before 69
- 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
- www.mozilla.org/security/advisories/mfsa2019-25/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-35/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2019-33/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- usn.ubuntu.com/4335-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11758?
- CVE-2019-11758 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-2019-11758?
- High severity. CVSS v3 base score is 8.8 out of 10.