Detections
Analytics
10.1 Ensure that Resource Locks are set for Mission-Critical Azure Resources
Information
Resource Manager Locks provide a way for administrators to lock down Azure resources to prevent deletion of, or modifications to, a resource. These locks sit outside of the Role Based Access Controls (RBAC) hierarchy and, when applied, will place restrictions on the resource for all users. These locks are very useful when there is an important resource in a subscription that users should not be able to delete or change. Locks can help prevent accidental and malicious changes or deletion.Rationale:
As an administrator, it may be necessary to lock a subscription, resource group, or resource to prevent other users in the organization from accidentally deleting or modifying critical resources. The lock level can be set to to CanNotDelete or ReadOnly to achieve this purpose.
CanNotDelete means authorized users can still read and modify a resource, but they cannot delete the resource.
ReadOnly means authorized users can read a resource, but they cannot delete or update the resource. Applying this lock is similar to restricting all authorized users to the permissions granted by the Reader role.
Impact:
There can be unintended outcomes of locking a resource. Applying a lock to a parent service will cause it to be inherited by all resources within. Conversely, applying a lock to a resource may not apply to connected storage, leaving it unlocked. Please see the documentation for further information.
NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.
Solution
From Azure PortalNavigate to the specific Azure Resource or Resource Group
For each mission critical resource, click on Locks
Click Add
Give the lock a name and a description, then select the type, Read-only or Delete as appropriate
Click OK
From Azure CLI
To lock a resource, provide the name of the resource, its resource type, and its resource group name.
az lock create --name <LockName> --lock-type <CanNotDelete/Read-only> --resource-group <resourceGroupName> --resource-name <resourceName> --resource-type <resourceType>
From Powershell
Get-AzResourceLock -ResourceName <Resource Name> -ResourceType <Resource Type> -ResourceGroupName <Resource Group Name> -Locktype <CanNotDelete/Read-only>
Default Value:
By default, no locks are set.
See Also
Item Details
Audit Name: CIS Microsoft Azure Foundations v2.0.0 L2
References: CSCv7|14.6
Plugin: microsoft_azure
Control ID: 492666763c192d392fa6c4031c5dd3e6365dc9cf392cbd0dab9695b74efff4a6