zt_net_003 — Subnet has no associated Network Security Group¶
Summary
Severity: High · Pillar: Network · Chain role: ENABLER
Description¶
Subnets without an NSG rely entirely on adjacent resource controls; defense-in-depth requires at least one NSG layer on every subnet.
Mapping¶
| Framework | Control / Reference |
|---|---|
| NIST 800-53 | SC-7 |
| NIST 800-207 | Tenet 5 - Integrity monitored |
| CIS Azure | — |
| MITRE ATT&CK Technique | T1021 |
| MITRE ATT&CK Tactic | Lateral Movement |
| Zero-Trust Tenet | Tenet 5 |
| Framework tags | nist-800-207, argus-zt |
Source¶
Rule defined at policies/azure/zt/network/zt_net_003.rego.