Function App Authentication Disabled

• Query id: e65a0733-94a0-4826-82f4-df529f4c593f
• Query name: Function App Authentication Disabled
• Platform: Terraform
• Severity: Medium
• Category: Access Control
• URL: Github

Description

Azure Function App authentication settings should be enabled
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "azurerm_function_app" "positive1" {
  name                       = "test-azure-functions"
  location                   = azurerm_resource_group.example.location
  resource_group_name        = azurerm_resource_group.example.name
  app_service_plan_id        = azurerm_app_service_plan.example.id
  storage_account_name       = azurerm_storage_account.example.name
  storage_account_access_key = azurerm_storage_account.example.primary_access_key
}

Positive test num. 2 - tf file

resource "azurerm_function_app" "positive2" {
  name                       = "test-azure-functions"
  location                   = azurerm_resource_group.example.location
  resource_group_name        = azurerm_resource_group.example.name
  app_service_plan_id        = azurerm_app_service_plan.example.id
  storage_account_name       = azurerm_storage_account.example.name
  storage_account_access_key = azurerm_storage_account.example.primary_access_key

   auth_settings {
    enabled = false
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "azurerm_function_app" "negative" {
  name                       = "test-azure-functions"
  location                   = azurerm_resource_group.example.location
  resource_group_name        = azurerm_resource_group.example.name
  app_service_plan_id        = azurerm_app_service_plan.example.id
  storage_account_name       = azurerm_storage_account.example.name
  storage_account_access_key = azurerm_storage_account.example.primary_access_key

   auth_settings {
    enabled = true
  }
}