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Virtual Machines should use Managed Disks Affecting Storage service in Azure

Severity

0.0
medium
0
10
    Severity Framework
    Snyk CCSS
    Rule category
    Data / Encryption Protocols

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    Frameworks
    CIS-Azure
  • Snyk ID SNYK-CC-00695
  • credit Snyk Research Team
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Description

Virtual Machines should use Managed Disks. Virtual Machine managed disks are designed for security and reliability in mind, so in most cases, users should use managed disks instead of their own disks. Managed disks are encrypted by default with Microsoft-managed keys, and are integrated with availability sets and support availability zones for high availability.

How to fix?

Virtual Machines should use Managed Disks for OS and data.

Example Configuration

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "resources": [
        {
            "type": "Microsoft.Compute/virtualMachines",
            "apiVersion": "2022-03-01",
            "name": "allowed1",
            "location": "[resourceGroup().location]",
            "dependsOn": [
                "[resourceId('Microsoft.Network/networkInterfaces', 'example-nic1-695')]",
                "[resourceId('Microsoft.Compute/disks', 'example-md1-695')]"
            ],
            "properties": {
                "hardwareProfile": {
                    "vmSize": "Standard_DS1_v2"
                },
                "osProfile": {
                    "computerName": "hostname695-1",
                    "adminUsername": "testadmin",
                    "adminPassword": "Password1234!"
                },
                "storageProfile": {
                    "imageReference": {
                        "publisher": "Canonical",
                        "offer": "UbuntuServer",
                        "sku": "16.04-LTS",
                        "version": "latest"
                    },
                    "osDisk": {
                        "name": "myosdisk695-1",
                        "createOption": "FromImage",
                        "deleteOption": "Delete",
                        "managedDisk": {
                            "storageAccountType": "Standard_LRS"
                        }
                    },
                    "dataDisks": [
                        {
                            "name": "example-md1-695",
                            "diskSizeGB": "[reference(resourceId('Microsoft.Compute/disks', 'example-md1-695'), '2022-03-02', 'Full').properties.diskSizeGB]",
                            "lun": 0,
                            "createOption": "Attach",
                            "deleteOption": "Delete",
                            "managedDisk": {
                                "id": "[resourceId('Microsoft.Compute/disks', 'example-md1-695')]"
                            }
                        }
                    ]
                },
                "networkProfile": {
                    "networkInterfaces": [
                        {
                            "id": "[resourceId('Microsoft.Network/networkInterfaces', 'example-nic1-695')]"
                        }
                    ]
                },
                "diagnosticsProfile": {
                    "bootDiagnostics": {
                        "enabled": false
                    }
                }
            }
        }       
    ]
}