Vulnerability in Mozilla Firefox
CVE-2023-6863
The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
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: 0.010 (62.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · 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
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (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)
- lists.debian.org/debian-lts-announce/2023/12/msg00020.html (Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202401-10 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-6863?
- CVE-2023-6863 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 8.8/10. Published 2023-12-19.
- How severe is CVE-2023-6863?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2023-6863 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.