Control: 1.23 Ensure That No Custom Subscription Owner Roles Are Created

Description

Subscription ownership should not include permission to create custom owner roles. The principle of least privilege should be followed and only necessary privileges should be assigned instead of allowing full administrative access.

Classic subscription admin roles offer basic access management and include Account Administrator, Service Administrator, and Co-Administrators. It is recommended the least necessary permissions be given initially. Permissions can be added as needed by the account holder. This ensures the account holder cannot perform actions which were not intended.

Remediation

From Azure Portal

1. From Azure Home select the Portal Menu
2. Select Subscriptions under Navigate
3. Select in the left column Access control (IAM)
4. In the row select of filters Role:, then the # Displayed
5. In the list of checkmarks deselect 'Show all' to display no roles.
6. Search for Owner or select it if it already displayed to show only users with the Owner role
7. To remove this permission from a user, select the checkbox under the Owner
8. In the top row, select Remove X
9. Select Yes

From Azure CLI

az role definition list

Check for entries with assignableScope of / or a subscription, and an action of * Verify the usage and impact of removing the role identified

az role definition delete --name "rolename"

Default Value

By default, no custom owner roles are created.