Virtual Machine Does Not Use Managed Disk

Overview

Migrate blob-based VHDs to Managed Disks on Virtual Machines to exploit the default features of this configuration.

Managed disks are by default encrypted on the underlying hardware, so no additional encryption is required for basic protection. It is available if additional encryption is required. Managed disks are by design more resilient that storage accounts.

For ARM-deployed Virtual Machines, Azure Adviser will at some point recommend moving VHDs to managed disks both from a security and cost management perspective.

There are additional costs for managed disks based off of disk space allocated. When converting to managed disks, VMs will be powered off and back on.

Vendor

Azure

Cloud Service

Compute

Related Controls

CIS Azure v2.0.0 7.2

References

https://docs.microsoft.com/en-us/azure/virtual-machines/windows/convert-unmanaged-to-managed-disks, https://docs.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-data-protection#dp-4-enable-data-at-rest-encryption-by-default, https://docs.microsoft.com/en-us/azure/virtual-machines/faq-for-disks, https://azure.microsoft.com/en-us/pricing/details/managed-disks/

Severity

3

Item Types

Microsoft.Compute.VirtualMachine