Cognitive Services should restrict network access

High Azure General accounts-network-deny

Applies to

Microsoft.CognitiveServices/accounts

What CGPulse checks

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

How to fix it

Restrict network access by setting default action to Deny and adding allowed networks. In Azure Portal: Cognitive Services > Networking > set Default action to Deny. See: https://learn.microsoft.com/en-us/azure/ai-services/cognitive-services-virtual-networks

Careful: Setting default network action to Deny blocks all connections not routed through private endpoints or VNet rules

CLI

az cognitiveservices account update --ids "{id}" --default-action Deny

Terraform

resource "azurerm_cognitive_account" "{name}" {
  name                  = "{name}"
  resource_group_name   = "{rg}"
  location              = var.location
  kind                  = "CognitiveServices"
  sku_name              = "S0"
  network_acls {
    default_action = "Deny"
  }
}

Compliance frameworks

Cloud Security BaselineNS-2

Vendor documentation

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