CVE-2023-3961
Samba: smbd allows client access to unix domain sockets on the file system as root
At a glance
- Source
- NVD
- EPSS
- EPSS 2.69 % · percentile 86 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
A path traversal vulnerability was identified in Samba when processing client pipe names connecting to Unix domain sockets within a private directory. Samba typically uses this mechanism to connect SMB clients to remote procedure call (RPC) services like SAMR LSA or SPOOLSS, which Samba initiates on demand. However, due to inadequate sanitization of incoming client pipe names, allowing a client to send a pipe name containing Unix directory traversal characters (../). This could result in SMB clients connecting as root to Unix domain sockets outside the private directory. If an attacker or client managed to send a pipe name resolving to an external service using an existing Unix domain socket, it could potentially lead to unauthorized access to the service and consequential adverse events, including compromise or service crashes.
Weaknesses (CWE)
- CWE-22 — Path Traversal
References
- https://access.redhat.com/errata/RHSA-2023:6209
- https://access.redhat.com/errata/RHSA-2023:6744
- https://access.redhat.com/errata/RHSA-2023:7371
- https://access.redhat.com/errata/RHSA-2023:7408
- https://access.redhat.com/errata/RHSA-2023:7464
- https://access.redhat.com/errata/RHSA-2023:7467
- https://access.redhat.com/security/cve/CVE-2023-3961
- https://bugzilla.redhat.com/show_bug.cgi?id=2241881
- https://bugzilla.samba.org/show_bug.cgi?id=15422
- https://www.samba.org/samba/security/CVE-2023-3961.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
- https://security.netapp.com/advisory/ntap-20231124-0002/
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H | redhat |
| CVSS 3.1 | CRITICAL 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2023-44586
- GCVE · GCVE-0-2023-3961
CERT-FR advisories
- CERTFR-2025-AVI-0309 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0423 — Multiples vulnérabilités dans les produits NetApp · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0262 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2023-AVI-1011 — Multiples vulnérabilités dans les produits Qnap · cert.ssi.gouv.fr
- CERTFR-2023-AVI-0831 — Multiples vulnérabilités dans Samba · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*< 4.17.12cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*≥ 4.18.0 < 4.18.8cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*≥ 4.19.0 < 4.19.1cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:4.18.6-2.el8_9 < * |
| Red Hat · Red Hat Enterprise Linux 8 | unaffected 0:4.18.6-2.el8_9 < * |
| Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support | unaffected 0:4.15.5-13.el8_6 < * |
| Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support | unaffected 0:4.17.5-4.el8_8 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:4.18.6-101.el9_3 < * |
| Red Hat · Red Hat Enterprise Linux 9 | unaffected 0:4.18.6-101.el9_3 < * |
| Red Hat · Red Hat Enterprise Linux 9.0 Extended Update Support | unaffected 0:4.15.5-111.el9_0 < * |
| Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support | unaffected 0:4.17.5-104.el9_2 < * |
| Red Hat · Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | unaffected 0:4.15.5-13.el8_6 < * |
| Red Hat · Red Hat Enterprise Linux 6 | |
| Red Hat · Red Hat Enterprise Linux 6 | |
| Red Hat · Red Hat Enterprise Linux 7 | |
| Red Hat · Red Hat Storage 3 |
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 |