---
title: "NET-DB-011 BIND Zone Transfers Allowed to Any"
canonical: https://openvapt.com/checks/NET-DB-011.html
html: https://openvapt.com/checks/NET-DB-011.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-011 BIND Zone Transfers Allowed to Any

BIND permits zone transfers to any client.

- Domain: Network
- Severity: High
- Control category: Data Services
- Fix effort: low
- CVSS v3.1 vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`
- CIS Controls v8: 4.1
- NIST CSF 2.0: PR.PS-01
- CWE: CWE-497
- 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

Unrestricted transfers disclose the complete DNS namespace and provide attackers with a detailed target inventory.

## How It Detects

Reads named.conf and flags allow-transfer clauses containing any.

## How to Fix

Set allow-transfer to none or explicit secondary server addresses, preferably protected with TSIG.

## How to Verify

```
Run named-checkconf and verify AXFR is refused from an unauthorized test host.
```

## 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

- [BIND 9 Administrator Reference Manual - allow-transfer](https://bind9.readthedocs.io/en/latest/reference.html#namedconf-statement-allow-transfer)

## Source Code

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

Run it: `openvapt scan --only NET-DB-011`. Read it offline: `openvapt explain NET-DB-011`.

---

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