Description
The process_logon_packet function in the nmbd server for Samba 3.0.6 and earlier, when domain logons are enabled, allows remote attackers to cause a denial of service via a SAM_UAS_CHANGE request with a length value that is larger than the number of structures that are provided.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 3.0.7 | — |
| Debian 13 | samba | 3.0.7 | — |
| Debian 12 | samba | 3.0.7 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | samba +3 | 3.0.7-1.3E | RHSA-2004:467 |
Advisories 1
- RHSA-2004:467 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- 2004-0046 vendor-advisory
- RHSA-2004:467 vendor-advisory
- 20040913 Samba nmbd Invalid Length Denial of Service Vulnerability third-party-advisory
- 20040913 Samba 3.0 DoS Vulberabilities (CAN-2004-0807 & CAN-2004-0808) mailing-list
- 20040915 [OpenPKG-SA-2004.040] OpenPKG Security Advisory (samba) mailing-list
- CLA-2004:873 vendor-advisory
- MDKSA-2004:092 vendor-advisory
- oval:org.mitre.oval:def:10344 vdb-entry signature
- GLSA-200409-16 vendor-advisory