Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6 (Mozilla Firefox)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mozilla
- NVD status
- Modified
Description
Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 128.5, and Thunderbird 128.5. 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 was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
Weaknesses (CWE)
- CWE-787 — Out-of-bounds Write
References
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1827142%2C1932783
- https://www.mozilla.org/security/advisories/mfsa2025-01/
- https://www.mozilla.org/security/advisories/mfsa2025-02/
- https://www.mozilla.org/security/advisories/mfsa2025-04/
- https://www.mozilla.org/security/advisories/mfsa2025-05/
- https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2025-1575
- GCVE · GCVE-0-2025-0243
CERT-FR advisories
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0019 — Multiples vulnérabilités dans Mozilla Thunderbird · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0009 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*< 128.6.0cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*< 133.0cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*< 128.6.0cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*≥ 129.0 < 134.0
Affected products
| Product | Versions |
|---|---|
| Mozilla · Firefox | unaffected 128.6 ≤ 128.* ; unaffected 134 ≤ * |
| Mozilla · Thunderbird | unaffected 128.6 ≤ 128.* ; unaffected 134 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |