| name | cis-azure-storage-5.2.4 |
| description | Ensure 'Use infrastructure encryption for this vault' is enabled on Recovery Services vaults |
| category | cis-azure-storage |
| version | 1.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","storage","recovery-services","backup","encryption","infrastructure-encryption","double-encryption","cmk"] |
| cis_id | 5.2.4 |
| cis_benchmark | CIS Microsoft Azure Storage Services Benchmark v1.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
5.2.4 Ensure 'Use infrastructure encryption for this vault' is enabled on Recovery Services vaults (Automated)
Description
In addition to using customer-managed keys for encryption at rest in the Recovery Services vault, you can enable an additional layer of platform-managed infrastructure encryption. This dual-layer approach enhances the protection of your backup data.
Rationale
Enabling infrastructure encryption on an Azure Recovery Services vault adds a second layer of protection to backup data, enhancing security and ensuring compliance for sensitive data storage. This dual-layer strategy reduces the risk of unauthorized access by keeping data encrypted even if one layer is compromised.
Impact
Enabling infrastructure encryption on an Azure Recovery Services vault does not incur additional costs; however infrastructure encryption must be set when configuring the encryption of the vault for the first time and requires customer-managed keys for encryption at rest. Once configured, the infrastructure encryption setting cannot be changed. This recommendation is linked to Ensure that backup data in Recovery Services vaults is encrypted using customer-managed keys (CMK) and should be applied alongside it if you choose to implement this recommendation.
Audit Procedure
Audit from Azure Portal
- Go to
Recovery Services vaults.
- Click the name of a Recovery Services vault.
- Under
Settings, click Properties.
- Under
Encryption Settings, click Update.
- Under
Infrastructure encryption, ensure the box next to Use infrastructure encryption for this vault is checked.
- Repeat steps 1-5 for each Recovery Services vault.
Audit from Azure CLI
Run the following command to list Recovery Services vaults:
az backup vault list
For each Recovery Services vault, run the following command:
az backup vault encryption show --resource-group <resource-group> --name <recovery-services-vault>
Ensure that infrastructureEncryptionState is set to Enabled.
Audit from PowerShell
Run the following command to list Recovery Services vaults:
Get-AzRecoveryServicesVault
Run the following command to get the Recovery Services vault in a resource group with a given name:
