rules:
- id: gcp-sub-network-logging-enabled
  patterns:
  - pattern: |
      resource "google_compute_subnetwork" $ANYTHING {
        ...
      }
  - pattern-not-inside: |
      resource "google_compute_subnetwork" $ANYTHING {
        ...
        log_config {
          ...
        }        
        ...
      }
  message: Ensure that VPC Flow Logs is enabled for every subnet in a VPC Network
  languages: [hcl]
  severity: WARNING
  metadata:
    owasp:
    - A05:2017 - Broken Access Control
    - A01:2021 - Broken Access Control
    cwe:
    - 'CWE-284: Improper Access Control'
    technology:
    - terraform
    - gcp
    category: security
    references:
    - https://owasp.org/Top10/A01_2021-Broken_Access_Control
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW