Event Grid System Topic should use managed identity

Medium Azure General systemtopics-managed-identity

Applies to

Microsoft.EventGrid/systemTopics

What CGPulse checks

A resource passes this rule when identity.type must be one of ["SystemAssigned","UserAssigned","SystemAssigned,UserAssigned"]. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Enable managed identity to eliminate stored credentials and improve security. In Azure Portal: Event Grid System Topic > Identity > enable System-assigned. See: https://learn.microsoft.com/en-us/azure/event-grid/managed-service-identity

CLI

az resource update --ids "{id}" --set identity.type=SystemAssigned

Terraform

resource "azurerm_eventgrid_system_topic" "{name}" {
  name                   = "{name}"
  resource_group_name    = "{rg}"
  location               = var.location
  source_arm_resource_id = "/subscriptions/{sub}/resourceGroups/{rg}/providers/{sourceType}/{sourceName}"
  topic_type             = "Microsoft.Storage.StorageAccounts"
  identity {
    type = "SystemAssigned"
  }
}

Compliance frameworks

Cloud Security: Azure Foundations

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