azure-functionapp-disallow-cors.yaml

rules:
- id: azure-functionapp-disallow-cors
  patterns:
  - pattern: |
      ["*"]
  - pattern-inside: allowed_origins = ...
  - pattern-inside: |
      $RESOURCE "azurerm_function_app" "..." {
      ...
      }
  message: ensure that CORS disallows all resources to access Function app
  languages: [hcl]
  severity: WARNING
  metadata:
    owasp:
    - A05:2021 - Security Misconfiguration
    cwe:
    - 'CWE-942: Permissive Cross-domain Policy with Untrusted Domains'
    category: security
    technology:
    - terraform
    - azure
    references:
    - https://owasp.org/Top10/A05_2021-Security_Misconfiguration
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW