---
title: "NET-DB-009 Unsafe Samba Guest or SMB1 Configuration"
canonical: https://openvapt.com/checks/NET-DB-009.html
html: https://openvapt.com/checks/NET-DB-009.html
site: OpenVAPT, https://openvapt.com/
license: OpenVAPT Source-Available Licence 1.3, https://openvapt.com/legal/licence-text.html
modified: 2026-10-14
version: 0.1.0-alpha.6
---

# NET-DB-009 Unsafe Samba Guest or SMB1 Configuration

Samba permits guest access, maps unknown users to guest, or allows SMB1.

- Domain: Network
- Severity: High
- Control category: Data Services
- Fix effort: low
- CVSS v3.1 vector: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`
- CIS Controls v8: 3.3
- NIST CSF 2.0: PR.AA-05, PR.DS-01
- CWE: CWE-732, CWE-306
- OWASP Top 10 2021: A05:2021
- NIST SP 800-53 Rev. 5: AC-3, CM-6, SC-7
- Benchmark topic: Secure data service configuration (topic only, no benchmark text)

## Why It Matters

Guest shares weaken accountability, while SMB1 lacks modern protocol protections and has a long history of severe flaws.

## How It Detects

Reads smb.conf and flags guest ok = yes, permissive map to guest modes, or a server min protocol below SMB2.

## How to Fix

Set guest ok = no, map to guest = Never, and server min protocol = SMB2_02 or newer. Review each share ACL.

## How to Verify

```
Run testparm -s during approved administration and confirm the effective values.
```

## Learn the Theory

- [P3 Network Exposure and Firewalls](https://openvapt.com/academy/p3.md)
- [P8 Data Services: Databases, File Shares, DNS and Mail](https://openvapt.com/academy/p8.md)

## References

- [Samba smb.conf Manual](https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html)

## Source Code

https://github.com/OpenVAPT/openvapt/blob/574f7f3333c44b75a3c649e2d93a76d507f75adf/internal/checks/network/services.go

Run it: `openvapt scan --only NET-DB-009`. Read it offline: `openvapt explain NET-DB-009`.

---

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