Buffer overflow in Mozilla Firefox
CVE-2023-6861
The `nsWindow::PickerOpen(void)` method was susceptible to a heap buffer overflow when running in headless mode. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
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: 0.014 (71.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-54/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-55/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-56/ (Vendor Advisory)
- www.debian.org/security/2023/dsa-5581 (Third Party Advisory)
- www.debian.org/security/2023/dsa-5582 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/12/msg00020.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/12/msg00021.html (Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202401-10 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-6861?
- CVE-2023-6861 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-12-19.
- How severe is CVE-2023-6861?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-6861 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.