| name | cis-azure-storage-17.4 |
| description | Ensure that 'Secure transfer required' is set to 'Enabled' |
| category | cis-azure-storage |
| version | 1.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","storage","storage-accounts","encryption","tls"] |
| cis_id | 17.4 |
| cis_benchmark | CIS Microsoft Azure Storage Services Benchmark v1.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
17.4 Ensure that 'Secure transfer required' is set to 'Enabled' (Automated)
Description
Enable data encryption in transit.
Rationale
The secure transfer option enhances the security of a storage account by only allowing requests to the storage account by a secure connection. For example, when calling REST APIs to access storage accounts, the connection must use HTTPS. Any requests using HTTP will be rejected when 'secure transfer required' is enabled. When using the Azure files service, connection without encryption will fail, including scenarios using SMB 2.1, SMB 3.0 without encryption, and some flavors of the Linux SMB client. Because Azure storage doesn't support HTTPS for custom domain names, this option is not applied when using a custom domain name.
Impact
No specific impact noted. This is a standard security best practice.
Audit Procedure
Audit from Azure Portal
- Go to
Storage Accounts.
- For each storage account, under
Settings, click Configuration.
- Ensure that
Secure transfer required is set to Enabled.
Audit from Azure CLI
Use the below command to ensure the Secure transfer required is enabled for all the Storage Accounts by ensuring the output contains true for each of the Storage Accounts.
az storage account list --query "[*].[name,enableHttpsTrafficOnly]"
Audit from Azure Policy
Policy ID: 404c3081-a854-4457-ae30-26a93ef643f9 - Name: 'Secure transfer to storage accounts should be enabled'
Expected Result
The Secure transfer required setting should be Enabled for all storage accounts. The CLI output should show true for enableHttpsTrafficOnly for each storage account.
Remediation
Remediate from Azure Portal
- Go to
Storage Accounts.
- For each storage account, under
Settings, click Configuration.
- Set
Secure transfer required to Enabled.
- Click
Save.
Remediate from Azure CLI
Use the below command to enable for a :
