Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:6.4.38-3.el10_2.1 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:6.4.24-1.el8_10.1 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:6.4.24-1.el9_8.1 before * |
| Red Hat / Red Hat Enterprise Linux 6 | affected |
| Red Hat / Red Hat Enterprise Linux 7 | affected |
CWE
CWE-121
References
- 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
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.