Control: 4.16 Ensure 'Cross Tenant Replication' is not enabled

Description

Cross Tenant Replication in Azure allows data to be replicated across multiple Azure tenants. While this feature can be beneficial for data sharing and availability, it also poses a significant security risk if not properly managed. Unauthorized data access, data leakage, and compliance violations are potential risks. Disabling Cross Tenant Replication ensures that data is not inadvertently replicated across different tenant boundaries without explicit authorization.

Disabling Cross Tenant Replication minimizes the risk of unauthorized data access and ensures that data governance policies are strictly adhered to. This control is especially critical for organizations with stringent data security and privacy requirements, as it prevents the accidental sharing of sensitive information.

Remediation

From Azure Portal

1. Go to Storage Accounts.
2. For each storage account, under Data management, click Object replication.
3. Click Advanced settings.
4. Uncheck Allow cross-tenant replication.
5. Click OK.

From Azure CLI

Replace the information within <> with appropriate values:

az storage account update --name <storageAccountName> --resource-group <resourceGroupName> --allow-cross-tenant-replication false

Default Value

For new storage accounts created after Dec 15, 2023 cross tenant replication is not enabled.