Control: 9.10 Ensure FTP deployments are disabled

Description

By default, Azure Functions, Web and API Services can be deployed over FTP. If FTP is required for an essential deployment workflow, FTPS should be required for FTP login for all App Service Apps and Functions. Azure FTP deployment endpoints are public.

An attacker listening to traffic on a wifi network used by a remote employee or a corporate network could see login traffic in clear- text which would then grant them full control of the code base of the app or service. This finding is more severe if User Credentials for deployment are set at the subscription level rather than using the default Application Credentials which are unique per App.

Remediation

From Console

For Web Apps:

Login to Azure Portal and go to App Services.
Click on each App.
Under Settings section, click on Configuration.
Go to General settings tab.
Under Platform settings, select FTP state to Disabled or FTPS only.
Click Save.

For Function Apps:

Login to Azure Portal and go to Function App.
Click on each App.
Under Settings section, click on Configuration.
Go to General settings tab.
Under Platform settings, select FTP state to Disabled or FTPS only.
Click Save.

Usage

Run the control in your terminal:

powerpipe control run azure_compliance.control.cis_v140_9_10

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run azure_compliance.control.cis_v140_9_10 --share

SQL

This control uses a named query:

select
    fa.id as resource,
    case
      when configuration -> 'properties' ->> 'ftpsState' = 'AllAllowed' then 'alarm'
      else 'ok'
    end as status,
    case
      when configuration -> 'properties' ->> 'ftpsState' = 'AllAllowed' then name || ' FTP deployments enabled.'
      else name || ' FTP deployments disabled.'
    end as reason
  
  , fa.resource_group as resource_group
  , sub.display_name as subscription
  from
    azure_app_service_function_app fa,
    azure_subscription sub
  where
    sub.subscription_id = fa.subscription_id
union
  select
    wa.id as resource,
    case
      when configuration -> 'properties' ->> 'ftpsState' = 'AllAllowed' then 'alarm'
      else 'ok'
    end as status,
    case
      when configuration -> 'properties' ->> 'ftpsState' = 'AllAllowed' then name || ' FTP deployments enabled.'
      else name || ' FTP deployments disabled.'
    end as reason
  
  , wa.resource_group as resource_group
  , sub.display_name as subscription
  from
    azure_app_service_web_app as wa
    left join azure_subscription as sub on sub.subscription_id = wa.subscription_id;

Control: 9.10 Ensure FTP deployments are disabled

Description

Remediation

From Console

Usage

SQL

Tags