Buffer overflow in Mozilla Firefox
CVE-2023-4055
When the number of cookies per domain was exceeded in `document.cookie`, the actual cookie jar sent to the host was no longer consistent with expected cookie jar state. This could have caused requests to be sent with some cookies missing. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · 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-2023-4055?
- CVE-2023-4055 is a high-severity vulnerability in Mozilla Firefox, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-08-01.
- How severe is CVE-2023-4055?
- High severity. CVSS v3 base score is 7.5 out of 10.