Web App Not Using TLS Last Version

• Query id: b5c851d5-00f1-43dc-a8de-3218fd6f71be
• Query name: Web App Not Using TLS Last Version
• Platform: AzureResourceManager
• Severity: Medium
• Category: Encryption
• CWE: 327
• Risk score: 5.9
• URL: Github

Description

Resources of type 'Microsoft.Web/sites' should define 'properties.siteConfig.minTlsVersion' with '1.2' or '1.3'
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {
    siteConfig: {
      minTlsVersion: '1.0'
    }
  }
}

Positive test num. 2 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "name": "App",
          "location": "[resourceGroup().location]",
          "properties": {
            "siteConfig": {
              "minTlsVersion": "1.0"
            }
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 3 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {}
}

Positive test num. 4 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "name": "App",
          "location": "[resourceGroup().location]",
          "properties": {}
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 5 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {
    siteConfig: {
      minTlsVersion: '1.1'
    }
  }
}

Positive 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": [
        {
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "name": "App",
          "location": "[resourceGroup().location]",
          "properties": {
            "siteConfig": {
              "minTlsVersion": "1.1"
            }
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 7 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {
    siteConfig: {}
  }
}

Positive 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": [
        {
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "name": "App",
          "location": "[resourceGroup().location]",
          "properties": {
            "siteConfig": {}
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Positive test num. 9 - bicep file

resource meuAppService 'Microsoft.Web/sites@2022-09-01' = {
  name: 'meuAppService'
  location: 'West Europe'
  properties: {}
}

resource meuAppService_web 'Microsoft.Web/sites/config@2022-09-01' = {
  parent: meuAppService
  name: 'web'
  properties: {
    minTlsVersion: '1.1'
  }
}

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": "0.39.26.7824",
      "templateHash": "11739403591702951112"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-09-01",
      "name": "meuAppService",
      "location": "West Europe",
      "properties": {}
    },
    {
      "type": "Microsoft.Web/sites/config",
      "apiVersion": "2022-09-01",
      "name": "[format('{0}/{1}', 'meuAppService', 'web')]",
      "properties": {
        "minTlsVersion": "1.1"
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/sites', 'meuAppService')]"
      ]
    }
  ]
}

Positive test num. 11 - bicep file

resource meuAppService 'Microsoft.Web/sites@2022-09-01' = {
  name: 'meuAppService'
  location: 'West Europe'
  properties: {}
}

resource meuAppService_web 'Microsoft.Web/sites/config@2022-09-01' = {
  parent: meuAppService
  name: 'web'
  properties: {}
}

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": "0.39.26.7824",
      "templateHash": "750350632139492718"
    }
  },
  "resources": [
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-09-01",
      "name": "meuAppService",
      "location": "West Europe",
      "properties": {}
    },
    {
      "type": "Microsoft.Web/sites/config",
      "apiVersion": "2022-09-01",
      "name": "[format('{0}/{1}', 'meuAppService', 'web')]",
      "properties": {},
      "dependsOn": [
        "[resourceId('Microsoft.Web/sites', 'meuAppService')]"
      ]
    }
  ]
}

Code samples without security vulnerabilities

Negative test num. 1 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {
    siteConfig: {
      minTlsVersion: '1.3'
    }
  }
}

Negative test num. 2 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2020-12-01",
      "name": "App",
      "location": "[resourceGroup().location]",
      "properties": {
        "siteConfig": {
          "minTlsVersion": "1.3"
        }
      }
    }
  ]
}

Negative test num. 3 - bicep file

resource App 'Microsoft.Web/sites@2020-12-01' = {
  name: 'App'
  location: resourceGroup().location
  properties: {
    siteConfig: {
      minTlsVersion: '1.2'
    }
  }
}

Negative test num. 4 - json file

{
  "properties": {
    "template": {
      "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
      "contentVersion": "1.0.0.0",
      "resources": [
        {
          "type": "Microsoft.Web/sites",
          "apiVersion": "2020-12-01",
          "name": "App",
          "location": "[resourceGroup().location]",
          "properties": {
            "siteConfig": {
              "minTlsVersion": "1.2"
            }
          }
        }
      ],
      "outputs": {}
    },
    "parameters": {}
  },
  "kind": "template",
  "type": "Microsoft.Blueprint/blueprints/artifacts",
  "name": "myTemplate"
}

Negative test num. 5 - bicep file

resource meuAppService 'Microsoft.Web/sites@2022-09-01' = {
  name: 'meuAppService'
  location: 'West Europe'
  properties: {}
}

resource meuAppService_web 'Microsoft.Web/sites/config@2022-09-01' = {
  parent: meuAppService
  name: 'web'
  properties: {
    minTlsVersion: '1.2'
  }
}

Negative test num. 6 - json file

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "resources": [
    {
      "type": "Microsoft.Web/sites",
      "apiVersion": "2022-09-01",
      "name": "meuAppService",
      "location": "West Europe",
      "properties": {}
    },
    {
      "type": "Microsoft.Web/sites/config",
      "apiVersion": "2022-09-01",
      "name": "meuAppService/web",
      "dependsOn": [
        "Microsoft.Web/sites/meuAppService"
      ],
      "properties": {
        "minTlsVersion": "1.2"
      }
    }
  ]
}