Use After Free in Mozilla Firefox
CVE-2023-4573
When receiving rendering data over IPC `mStream` could have been destroyed when initialized, which could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-34/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-35/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-36/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-37/
- www.mozilla.org/security/advisories/mfsa2023-38/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-4573?
- CVE-2023-4573 is a medium-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 6.5/10. Published 2023-09-11.
- How severe is CVE-2023-4573?
- Medium severity. CVSS v3 base score is 6.5 out of 10.