Cis Azure Foundations 2.1.9

Ensure 'No Public IP' is set to 'Enabled'

Description

Enable secure cluster connectivity (also known as no public IP) on Azure Databricks workspaces to ensure that clusters do not have public IP addresses and communicate with the control plane over a secure connection.

Rationale

Enabling secure cluster connectivity limits exposure to the public internet, improving security and reducing the risk of external attacks.

Impact

Enabling secure cluster connectivity requires careful network configuration. Before secure cluster connectivity can be enabled, Azure Databricks workspaces must be deployed in a customer-managed virtual network (VNet injection) -- refer to the recommendation Ensure that Azure Databricks is deployed in a customer-managed virtual network (VNet).

Audit Procedure

Audit from Azure Portal

1. Go to Azure Databricks.
2. Click the name of a workspace.
3. Under Settings, click Networking.
4. Under Network access, ensure that Deploy Azure Databricks workspace with Secure Cluster Connectivity (No Public IP) is set to Enabled.
5. Repeat steps 1-4 for each workspace.

Audit from Azure CLI

Run the following command to list workspaces:

az databricks workspace list

For each workspace, run the following command to get the enableNoPublicIp setting:

az databricks workspace show --resource-group <resource-group> --name <workspace> --query parameters.enableNoPublicIp.value

Ensure that true is returned.

Audit from PowerShell

Run the following command to list workspaces:

Get-AzDatabricksWorkspace

Run the following command to get the workspace in a resource group with a given name:

$workspace = Get-AzDatabricksWorkspace -ResourceGroupName <resource-group> -Name <workspace>

Run the following command to get the EnableNoPublicIp setting:

$workspace.EnableNoPublicIP

Ensure that True is returned. Repeat for each workspace.

Audit from Azure Policy

• Policy ID: 51c1490f-3319-459c-bbbc-7f391bbed753 - Name: 'Azure Databricks Clusters should disable public IP'

Expected Result

The enableNoPublicIp parameter should return true for all Databricks workspaces. No cluster nodes should have public IP addresses assigned.

Remediation

Remediate from Azure Portal

1. Go to Azure Databricks.
2. Click the name of a workspace.
3. Under Settings, click Networking.
4. Under Network access, next to Deploy Azure Databricks workspace with Secure Cluster Connectivity (No Public IP), click the radio button next to Enabled.
5. Click Save.
6. Repeat steps 1-5 for each workspace requiring remediation.

Remediate from Azure CLI

For each workspace requiring remediation, run the following command to set enableNoPublicIp to true:

az databricks workspace update --resource-group <resource-group> --name <workspace> --enable-no-public-ip true

Remediate from PowerShell

For each workspace requiring remediation, run the following command to set EnableNoPublicIP to True:

Update-AzDatabricksWorkspace -ResourceGroupName <resource-group> -Name <workspace> -EnableNoPublicIP

Default Value

No Public IP is set to Enabled by default.

References

1. https://learn.microsoft.com/en-us/azure/databricks/security/network/classic/secure-cluster-connectivity
2. https://learn.microsoft.com/en-us/cli/azure/databricks/workspace
3. https://learn.microsoft.com/en-us/powershell/module/az.databricks

CIS Controls

MITRE ATT&CK Mappings

Profile

Level 1 | Automated