terraform.azure.security.azure-key-no-expiration-date.azure-key-no-expiration-date

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LGPL Commons Clause
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Ensure that the expiration date is set on all keys

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Defintion

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rules:
  - id: azure-key-no-expiration-date
    message: Ensure that the expiration date is set on all keys
    patterns:
      - pattern: resource
      - pattern-not-inside: |
          resource "azurerm_key_vault_key" "..." {
          ...
          expiration_date = "..."
          ...
          }
      - pattern-inside: |
          resource "azurerm_key_vault_key" "..." {
          ...
          }
    metadata:
      owasp:
        - A03:2017 - Sensitive Data Exposure
      cwe:
        - "CWE-320: CWE CATEGORY: Key Management Errors"
      category: security
      technology:
        - terraform
        - azure
      references:
        - https://owasp.org/Top10/A02_2021-Cryptographic_Failures
      subcategory:
        - vuln
      likelihood: LOW
      impact: LOW
      confidence: MEDIUM
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
      vulnerability_class:
        - Cryptographic Issues
    languages:
      - hcl
    severity: WARNING

Examples

azure-key-no-expiration-date.tf

# fail
# ruleid: azure-key-no-expiration-date
resource "azurerm_key_vault_key" "generated" {
    name         = "generated-certificate"
    key_vault_id = azurerm_key_vault.example.id
    key_type     = "RSA"
    key_size     = 2048

    key_opts = [
    "decrypt",
    "encrypt",
    "sign",
    "unwrapKey",
    "verify",
    "wrapKey",
    ]
}

# pass
resource "azurerm_key_vault_key" "generated" {
    name         = "generated-certificate"
    key_vault_id = azurerm_key_vault.example.id
    key_type     = "RSA"
    key_size     = 2048

    key_opts = [
    "decrypt",
    "encrypt",
    "sign",
    "unwrapKey",
    "verify",
    "wrapKey",
    ]
    expiration_date = "2020-12-30T20:00:00Z"
}