Buffer overflow in Mozilla Firefox
CVE-2020-15659
Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. 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 < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
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: 0.024 (83.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · 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, 20.04
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2020-30/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-35/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-32/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-33/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2020-31/ (Vendor Advisory)
- bugzilla.mozilla.org/buglist.cgi (Permissions Required, Issue Tracking, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00022.html (vendor-advisory, Patch, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html (vendor-advisory, Patch, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00032.html (vendor-advisory, Patch, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4443-1/ (vendor-advisory, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15659?
- CVE-2020-15659 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2020-08-10.
- How severe is CVE-2020-15659?
- High severity. CVSS v3 base score is 8.8 out of 10.