Vulnerability in Mozilla Firefox
CVE-2023-4049
Race conditions in reference counting code were found through code inspection. These could have resulted in potentially exploitable use-after-free vulnerabilities. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Debian Linux — versions 11.0, 12.0
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-29/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-30/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-31/ (Vendor Advisory)
- www.debian.org/security/2023/dsa-5464 (Third Party Advisory)
- www.debian.org/security/2023/dsa-5469 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/08/msg00008.html
- lists.debian.org/debian-lts-announce/2023/08/msg00010.html
Frequently asked questions
- What is CVE-2023-4049?
- CVE-2023-4049 is a medium-severity vulnerability in Mozilla Firefox, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2023-08-01.
- How severe is CVE-2023-4049?
- Medium severity. CVSS v3 base score is 5.9 out of 10.