Out-of-bounds Read in Mozilla Firefox
CVE-2022-31747
Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · 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
- www.mozilla.org/security/advisories/mfsa2022-20/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2022-22/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2022-21/ (Vendor Advisory)
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-31747?
- CVE-2022-31747 is a critical-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2022-12-22.
- How severe is CVE-2022-31747?
- Critical severity. CVSS v3 base score is 9.8 out of 10.