CVE-2026-94184
Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)
MEDIUM 5.3
En bref
- Source
- NVD
- EPSS
- EPSS 1.20 % · centile 68 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Awaiting Analysis
Description
A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.
Faiblesses (CWE)
- CWE-121 — Débordement de tampon sur la pile
Références
- https://access.redhat.com/errata/RHSA-2026:85959
- https://access.redhat.com/errata/RHSA-2026:86981
- https://access.redhat.com/errata/RHSA-2026:86982
- https://access.redhat.com/security/cve/CVE-2026-94184
- https://bugzilla.redhat.com/show_bug.cgi?id=2531984
- https://bugzilla.redhat.com/show_bug.cgi?id=2537395
- https://gitlab.com/fetchmail/fetchmail/-/commit/cb5be5c38471eec19e519ace0bc569176317ea92
- https://www.fetchmail.info/fetchmail-SA-2026-01.txt
- https://www.openwall.com/lists/oss-security/2026/06/27/8
- http://www.openwall.com/lists/oss-security/2026/09/23/1
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | redhat |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-83923
- GCVE · GCVE-0-2026-94184
Produits affectés
| Produit | Versions |
|---|---|
| Red Hat · Red Hat Enterprise Linux 10 | unaffected 0:6.4.38-3.el10_2.1 < * |
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:6.4.24-1.el8_10.1 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:6.4.24-1.el9_8.1 < * |
| Red Hat · Red Hat Enterprise Linux 6 | |
| Red Hat · Red Hat Enterprise Linux 7 |
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 |
| 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 |