Control: 1.13 Ensure API keys are restricted to use by only specified Hosts and Apps

Description

Unrestricted keys are insecure because they can be viewed publicly, such as from within a browser, or they can be accessed on a device where the key resides. It is recommended to restrict API key usage to trusted hosts, HTTP referrers and apps.

Security risks involved in using API-Keys appear below:

API keys are simple encrypted strings
API keys do not identify the user or the application making the API request
API keys are typically accessible to clients, making it easy to discover and steal an API key

In light of these potential risks, Google recommends using the standard authentication flow instead of API keys. However, there are limited cases where API keys are more appropriate. For example, if there is a mobile application that needs to use the Google Cloud Translation API, but doesn't otherwise need a backend server, API keys are the simplest way to authenticate to that API.

Remediation

From Console

To find the listed API Keys with specified Hosts access and Apps

Login to APIs & Services\Credentials
In the section API Keys, Click the API Key Name. The API Key properties display on a new page.
For every API Key, ensure below

Application restrictions is not set to None.
API restrictions is not set to Don't restrict key

Alternatively you can set values as example:

Ensure Application restrictions is set to HTTP referrers and the referrer is not set to wild-cards (* or *.[TLD] or *.[TLD]/*) allowing access to any/wide HTTP referrer(s)

Or,

Ensure Application restrictions is set to IP addresses and referrer is not set to any host (0.0.0.0 or 0.0.0.0/0 or ::0)

Note By default, Application Restrictions are set to None.

Usage

Run the control in your terminal:

powerpipe control run gcp_compliance.control.cis_v120_1_13

Snapshot and share results via Turbot Pipes:

powerpipe login
powerpipe control run gcp_compliance.control.cis_v120_1_13 --share

SQL

This control uses a named query:

select
  'https://iam.googleapis.com/v1/projects/' || project || '/apikeys/' || name as resource,
  case
    when restrictions -> 'serverKeyRestrictions' is null
      and restrictions -> 'browserKeyRestrictions' is null
      and restrictions -> 'androidKeyRestrictions' is null
      and restrictions -> 'iosKeyRestrictions' is null then 'alarm'
    when restrictions -> 'serverKeyRestrictions' @> any( array[
    '{"allowedIps": ["0.0.0.0"]}', '{"allowedIps": ["0.0.0.0/0"]}', '{"allowedIps": ["::0"]}']::jsonb[]) then 'alarm'
    when restrictions -> 'browserKeyRestrictions' @> any( array[
    '{"allowedReferrers": ["*"]}','{"allowedReferrers": ["*.[TLD]/*"]}','{"allowedReferrers": ["*.[TLD]"]}' ]::jsonb[] ) then 'alarm'
    else 'ok'
  end as status,
  case
    when restrictions -> 'serverKeyRestrictions' is null
      and restrictions -> 'browserKeyRestrictions' is null
      and restrictions -> 'androidKeyRestrictions' is null
      and restrictions -> 'iosKeyRestrictions' is null
      then title || ' API key not restricted to use any specified Websites, Hosts and Apps.'
    when restrictions -> 'serverKeyRestrictions' @> any( array[
    '{"allowedIps": ["0.0.0.0"]}', '{"allowedIps": ["0.0.0.0/0"]}', '{"allowedIps": ["::0"]}']::jsonb[]) then title || ' API key open to any hosts.'
    when restrictions -> 'browserKeyRestrictions' @> any( array[
    '{"allowedReferrers": ["*"]}','{"allowedReferrers": ["*.[TLD]/*"]}','{"allowedReferrers": ["*.[TLD]"]}' ]::jsonb[] ) then  title || ' API key open to any or wide range of HTTP referrer(s).'
    else title || ' API key is restricted with specific Website(s), Host(s) and App(s).'
  end as reason
  , location as location, project as project
from
  gcp_apikeys_key;

Control: 1.13 Ensure API keys are restricted to use by only specified Hosts and Apps

Description

Remediation

From Console

Usage

SQL

Tags