Event Hub must use TLS 1.2 minimum

Applies to

• Microsoft.EventHub/namespaces

What CGPulse checks

A resource passes this rule when minimumTlsVersion must be one of ["1.2","1.3"]. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Set minimum TLS version to 1.2 to prevent protocol downgrade attacks. In Azure Portal: Event Hub namespace > Settings > set Minimum TLS version to 1.2. See: https://learn.microsoft.com/en-us/azure/event-hubs/transport-layer-security-configure-minimum-version

CLI

az eventhubs namespace update --ids "{id}" --minimum-tls-version 1.2

Terraform

resource "azurerm_eventhub_namespace" "{name}" {
  name                = "{name}"
  resource_group_name = "{rg}"
  location            = var.location
  sku                 = "Standard"
  minimum_tls_version = "1.2"
}

Compliance frameworks

• Cloud Security BaselineDP-3

Related Azure rules

• Action Group should be enabled
• Activity Log Alert should be enabled
• AKS cluster logs should be sent to Log Analytics
• AKS cluster must enable RBAC
• AKS cluster must enable RBAC
• AKS cluster should be a private cluster
• AKS cluster should disable local accounts
• AKS cluster should enable Azure RBAC for Kubernetes