App Service Authentication Is Not Set

• Query id: 83130a07-235b-4a80-918b-a370e53f0bd9
• Query name: App Service Authentication Is Not Set
• Platform: AzureResourceManager
• Severity: Medium
• Category: Access Control
• CWE: 778
• URL: Github

Description

Azure App Service should have App Service Authentication set
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: false
  }
}

Positive test num. 2 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "resources": [
        {
          "type": "config",
          "name": "authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "enabled": false
          }
        }
      ],
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    }
  ]
}

Positive test num. 3 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    alwaysOn: true
  }
}

Positive test num. 4 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "resources": [
        {
          "type": "config",
          "name": "authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "alwaysOn": true
          }
        }
      ],
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    }
  ]
}

Positive test num. 5 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: false
  }
}

Positive test num. 6 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    },
    {
      "type": "Microsoft.Web/sites/config",
      "name": "webApp1/authsettings",
      "apiVersion": "2020-12-01",
      "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
      "properties": {
        "enabled": false
      }
    }
  ]
}

Positive test num. 7 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    alwaysOn: false
  }
}

Positive test num. 8 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    },
    {
      "type": "Microsoft.Web/sites/config",
      "name": "webApp1/authsettings",
      "apiVersion": "2020-12-01",
      "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
      "properties": {
        "alwaysOn": false
      }
    }
  ]
}

Positive test num. 9 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: false
  }
}

Positive test num. 10 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "resources": [
            {
              "type": "config",
              "name": "authsettings",
              "apiVersion": "2020-12-01",
              "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
              "properties": {
                "enabled": false
              }
            }
          ],
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 11 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    alwaysOn: true
  }
}

Positive test num. 12 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "resources": [
            {
              "type": "config",
              "name": "authsettings",
              "apiVersion": "2020-12-01",
              "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
              "properties": {
                "alwaysOn": true
              }
            }
          ],
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 13 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: false
  }
}

Positive test num. 14 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        },
        {
          "type": "Microsoft.Web/sites/config",
          "name": "webApp1/authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "enabled": false
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 15 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    alwaysOn: false
  }
}

Positive test num. 16 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        },
        {
          "type": "Microsoft.Web/sites/config",
          "name": "webApp1/authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "alwaysOn": false
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Code samples without security vulnerabilities

Negative test num. 1 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: true
  }
}

Negative test num. 2 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "resources": [
        {
          "type": "config",
          "name": "authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "enabled": true
          }
        }
      ],
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    }
  ]
}

Negative test num. 3 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: true
  }
}

Negative test num. 4 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "name": "appServicePlan1",
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2018-02-01",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "F1",
        "capacity": 1
      },
      "tags": {
        "displayName": "appServicePlan1"
      },
      "properties": {
        "name": "appServicePlan1"
      }
    },
    {
      "name": "webApp1",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
        "displayName": "webApp1"
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      ],
      "properties": {
        "name": "webApp1",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
      }
    },
    {
      "type": "Microsoft.Web/sites/config",
      "name": "webApp1/authsettings",
      "apiVersion": "2020-12-01",
      "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
      "properties": {
        "enabled": true
      }
    }
  ]
}

Negative test num. 5 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: true
  }
}

Negative test num. 6 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "resources": [
            {
              "type": "config",
              "name": "authsettings",
              "apiVersion": "2020-12-01",
              "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
              "properties": {
                "enabled": true
              }
            }
          ],
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Negative test num. 7 - bicep file

resource appServicePlan1 'Microsoft.Web/serverfarms@2018-02-01' = {
  name: 'appServicePlan1'
  location: resourceGroup().location
  sku: {
    name: 'F1'
    capacity: 1
  }
  tags: {
    displayName: 'appServicePlan1'
  }
  properties: {
    name: 'appServicePlan1'
  }
}

resource webApp1 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webApp1'
  location: resourceGroup().location
  tags: {
    'hidden-related:${resourceGroup().id}/providers/Microsoft.Web/serverfarms/appServicePlan1': 'Resource'
    displayName: 'webApp1'
  }
  properties: {
    name: 'webApp1'
    serverFarmId: appServicePlan1.id
  }
}

resource webApp1_authsettings 'Microsoft.Web/sites/config@2020-12-01' = {
  parent: webApp1
  name: 'authsettings'
  properties: {
    enabled: true
  }
}

Negative test num. 8 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "name": "appServicePlan1",
          "type": "Microsoft.Web/serverfarms",
          "apiVersion": "2018-02-01",
          "location": "[resourceGroup().location]",
          "sku": {
            "name": "F1",
            "capacity": 1
          },
          "tags": {
            "displayName": "appServicePlan1"
          },
          "properties": {
            "name": "appServicePlan1"
          }
        },
        {
          "name": "webApp1",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "[resourceGroup().location]",
          "tags": {
            "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/appServicePlan1')]": "Resource",
            "displayName": "webApp1"
          },
          "dependsOn": [
            "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          ],
          "properties": {
            "name": "webApp1",
            "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', 'appServicePlan1')]"
          }
        },
        {
          "type": "Microsoft.Web/sites/config",
          "name": "webApp1/authsettings",
          "apiVersion": "2020-12-01",
          "dependsOn": [ "[resourceId('Microsoft.Web/sites', 'webApp1')]" ],
          "properties": {
            "enabled": true
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}