Website with Client Certificate Auth Disabled

• Query id: 92302b47-b0cc-46cb-a28f-5610ecda140b
• Query name: Website with Client Certificate Auth Disabled
• Platform: AzureResourceManager
• Severity: Medium
• Category: Networking and Firewall
• CWE: 287
• URL: Github

Description

'Microsoft.Web/sites' should have client certificate authentication enabled
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
  }
}

Positive test num. 2 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "2.0.0.0",
  "apiProfile": "2019-03-01-hybrid",
  "parameters": {},
  "variables": {},
  "functions": [],
  "resources": [
    {
      "name": "webSite",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "location1",
      "tags": {},
      "properties": {
        "enabled": true
      },
      "resources": []
    }
  ],
  "outputs": {}
}

Positive test num. 3 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
    clientCertEnabled: false
  }
}

Positive test num. 4 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "2.0.0.0",
  "apiProfile": "2019-03-01-hybrid",
  "parameters": {},
  "variables": {},
  "functions": [],
  "resources": [
    {
      "name": "webSite",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "location1",
      "tags": {},
      "properties": {
        "enabled": true,
        "clientCertEnabled": false
      },
      "resources": []
    }
  ],
  "outputs": {}
}

Positive test num. 5 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
  }
}

Positive test num. 6 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "2.0.0.0",
      "apiProfile": "2019-03-01-hybrid",
      "parameters": {},
      "variables": {},
      "functions": [],
      "resources": [
        {
          "name": "webSite",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "location1",
          "tags": {},
          "properties": {
            "enabled": true
          },
          "resources": []
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 7 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
    clientCertEnabled: false
  }
}

Positive test num. 8 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "2.0.0.0",
      "apiProfile": "2019-03-01-hybrid",
      "parameters": {},
      "variables": {},
      "functions": [],
      "resources": [
        {
          "name": "webSite",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "location1",
          "tags": {},
          "properties": {
            "enabled": true,
            "clientCertEnabled": false
          },
          "resources": []
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 9 - bicep file

param siteName string = 'myapp-no-http2'
param servicePlanName string = 'myapp-plan-nohttp2'

resource servicePlan 'Microsoft.Web/serverfarms@2022-03-01' = {
  name: servicePlanName
  location: resourceGroup().location
  sku: {
    name: 'S1'
    tier: 'Standard'
    size: 'S1'
    capacity: 1
  }
  kind: 'linux'
  properties: {
    reserved: true
  }
}

resource webApp 'Microsoft.Web/sites@2022-03-01' = {
  name: siteName
  location: resourceGroup().location
  kind: 'app,linux,container'
  properties: {
    serverFarmId: servicePlan.id
    clientCertEnabled: false
    siteConfig: {
      http20Enabled: false  
      linuxFxVersion: 'DOCKER|nginx:latest'
    }
  }
}

Positive test num. 10 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "metadata": {
    "_generator": {
      "name": "bicep",
      "version": "0.36.177.2456",
      "templateHash": "4694393287242918779"
    }
  },
  "parameters": {
    "siteName": {
      "type": "string",
      "defaultValue": "myapp-no-http2"
    },
    "servicePlanName": {
      "type": "string",
      "defaultValue": "myapp-plan-nohttp2"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2022-03-01",
      "name": "[parameters('servicePlanName')]",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "S1",
        "tier": "Standard",
        "size": "S1",
        "capacity": 1
      },
      "kind": "linux",
      "properties": {
        "reserved": true
      }
    },
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-03-01",
      "name": "[parameters('siteName')]",
      "location": "[resourceGroup().location]",
      "kind": "app,linux,container",
      "properties": {
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]",
        "clientCertEnabled": false,
        "siteConfig": {
          "http20Enabled": false,
          "linuxFxVersion": "DOCKER|nginx:latest"
        }
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]"
      ]
    }
  ]
}

Positive test num. 11 - bicep file

param siteName string = 'myapp-no-http2'
param servicePlanName string = 'myapp-plan-nohttp2'

resource servicePlan 'Microsoft.Web/serverfarms@2022-03-01' = {
  name: servicePlanName
  location: resourceGroup().location
  sku: {
    name: 'S1'
    tier: 'Standard'
    size: 'S1'
    capacity: 1
  }
  kind: 'linux'
  properties: {
    reserved: true
  }
}

resource webApp 'Microsoft.Web/sites@2022-03-01' = {
  name: siteName
  location: resourceGroup().location
  kind: 'app,linux,container'
  properties: {
    serverFarmId: servicePlan.id
    siteConfig: {
      http20Enabled: false  
      linuxFxVersion: 'DOCKER|nginx:latest'
    }
  }
}

Positive test num. 12 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "metadata": {
    "_generator": {
      "name": "bicep",
      "version": "0.36.177.2456",
      "templateHash": "8537683058673476993"
    }
  },
  "parameters": {
    "siteName": {
      "type": "string",
      "defaultValue": "myapp-no-http2"
    },
    "servicePlanName": {
      "type": "string",
      "defaultValue": "myapp-plan-nohttp2"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2022-03-01",
      "name": "[parameters('servicePlanName')]",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "S1",
        "tier": "Standard",
        "size": "S1",
        "capacity": 1
      },
      "kind": "linux",
      "properties": {
        "reserved": true
      }
    },
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-03-01",
      "name": "[parameters('siteName')]",
      "location": "[resourceGroup().location]",
      "kind": "app,linux,container",
      "properties": {
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]",
        "siteConfig": {
          "http20Enabled": false,
          "linuxFxVersion": "DOCKER|nginx:latest"
        }
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]"
      ]
    }
  ]
}

Code samples without security vulnerabilities

Negative test num. 1 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
    clientCertEnabled: true
  }
}

Negative test num. 2 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "2.0.0.0",
  "apiProfile": "2019-03-01-hybrid",
  "parameters": {},
  "variables": {},
  "functions": [],
  "resources": [
    {
      "name": "webSite",
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "location": "location1",
      "tags": {},
      "properties": {
        "enabled": true,
        "clientCertEnabled": true
      },
      "resources": []
    }
  ],
  "outputs": {}
}

Negative test num. 3 - bicep file

resource webSite 'Microsoft.Web/sites@2020-12-01' = {
  name: 'webSite'
  location: 'location1'
  tags: {}
  properties: {
    enabled: true
    clientCertEnabled: true
  }
}

Negative test num. 4 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "2.0.0.0",
      "apiProfile": "2019-03-01-hybrid",
      "parameters": {},
      "variables": {},
      "functions": [],
      "resources": [
        {
          "name": "webSite",
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "location": "location1",
          "tags": {},
          "properties": {
            "enabled": true,
            "clientCertEnabled": true
          },
          "resources": []
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Negative test num. 5 - bicep file

param siteName string = 'myapp-http2'
param servicePlanName string = 'myapp-plan'

resource servicePlan 'Microsoft.Web/serverfarms@2022-03-01' = {
  name: servicePlanName
  location: resourceGroup().location
  sku: {
    name: 'S1'
    tier: 'Standard'
    size: 'S1'
    capacity: 1
  }
  kind: 'linux'
  properties: {
    reserved: true
  }
}

resource webApp 'Microsoft.Web/sites@2022-03-01' = {
  name: siteName
  location: resourceGroup().location
  kind: 'app,linux,container'
  properties: {
    serverFarmId: servicePlan.id
    clientCertEnabled: false
    siteConfig: {
      http20Enabled: true  
      linuxFxVersion: 'DOCKER|nginx:latest'
    }
  }
}

Negative test num. 6 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "metadata": {
    "_generator": {
      "name": "bicep",
      "version": "0.36.177.2456",
      "templateHash": "7898345690734526102"
    }
  },
  "parameters": {
    "siteName": {
      "type": "string",
      "defaultValue": "myapp-http2"
    },
    "servicePlanName": {
      "type": "string",
      "defaultValue": "myapp-plan"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2022-03-01",
      "name": "[parameters('servicePlanName')]",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "S1",
        "tier": "Standard",
        "size": "S1",
        "capacity": 1
      },
      "kind": "linux",
      "properties": {
        "reserved": true
      }
    },
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-03-01",
      "name": "[parameters('siteName')]",
      "location": "[resourceGroup().location]",
      "kind": "app,linux,container",
      "properties": {
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]",
        "clientCertEnabled": false,
        "siteConfig": {
          "http20Enabled": true,
          "linuxFxVersion": "DOCKER|nginx:latest"
        }
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]"
      ]
    }
  ]
}

Negative test num. 7 - bicep file

param siteName string = 'myapp-http2-enabled'
param servicePlanName string = 'myapp-plan-http2'

resource servicePlan 'Microsoft.Web/serverfarms@2022-03-01' = {
  name: servicePlanName
  location: resourceGroup().location
  sku: {
    name: 'S1'
    tier: 'Standard'
    size: 'S1'
    capacity: 1
  }
  kind: 'linux'
  properties: {
    reserved: true
  }
}

resource webApp 'Microsoft.Web/sites@2022-03-01' = {
  name: siteName
  location: resourceGroup().location
  kind: 'app,linux,container'
  properties: {
    serverFarmId: servicePlan.id
    siteConfig: {
      http20Enabled: true
      linuxFxVersion: 'DOCKER|nginx:latest'
    }
  }
}

Negative test num. 8 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "metadata": {
    "_generator": {
      "name": "bicep",
      "version": "0.36.177.2456",
      "templateHash": "2348461675926151470"
    }
  },
  "parameters": {
    "siteName": {
      "type": "string",
      "defaultValue": "myapp-http2-enabled"
    },
    "servicePlanName": {
      "type": "string",
      "defaultValue": "myapp-plan-http2"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/serverfarms",
      "apiVersion": "2022-03-01",
      "name": "[parameters('servicePlanName')]",
      "location": "[resourceGroup().location]",
      "sku": {
        "name": "S1",
        "tier": "Standard",
        "size": "S1",
        "capacity": 1
      },
      "kind": "linux",
      "properties": {
        "reserved": true
      }
    },
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-03-01",
      "name": "[parameters('siteName')]",
      "location": "[resourceGroup().location]",
      "kind": "app,linux,container",
      "properties": {
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]",
        "siteConfig": {
          "http20Enabled": true,
          "linuxFxVersion": "DOCKER|nginx:latest"
        }
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms', parameters('servicePlanName'))]"
      ]
    }
  ]
}