Managed HSM should disable public network access

High Azure General managedhsm-no-public-access

Applies to

Microsoft.KeyVault/managedHSMs

What CGPulse checks

A resource passes this rule when publicNetworkAccess must equal Disabled. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Disable public network access to prevent unauthorized internet exposure. In Azure Portal: Managed HSM > Networking > set Public network access to Disabled. See: https://learn.microsoft.com/en-us/azure/key-vault/managed-hsm/private-link

Careful: Disabling public access blocks all connections not routed through private endpoints

CLI

az keyvault update-hsm --ids "{id}" --public-network-access Disabled

Terraform

resource "azurerm_key_vault_managed_hardware_security_module" "{name}" {
  name                       = "{name}"
  resource_group_name        = "{rg}"
  location                   = var.location
  sku_name                   = "Standard_B1"
  tenant_id                  = data.azurerm_client_config.current.tenant_id
  admin_object_ids           = [data.azurerm_client_config.current.object_id]
  purge_protection_enabled   = true
  public_network_access_enabled = false
}

Compliance frameworks

Cloud Security: Azure Foundations

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