Control: S3 bucket ACLs should prohibit public read access

powerpipe control run aws_perimeter.control.s3_bucket_acl_prohibit_public_read_access

powerpipe login
powerpipe control run aws_perimeter.control.s3_bucket_acl_prohibit_public_read_access --share

with data as (
  select
    distinct name
  from
    aws_s3_bucket,
    jsonb_array_elements(acl -> 'Grants') as grants
  where
    grants -> 'Grantee' ->> 'URI' = 'http://acs.amazonaws.com/groups/global/AllUsers'
    and (
      grants ->> 'Permission' = 'FULL_CONTROL'
      or grants ->> 'Permission' = 'READ_ACP'
    )
)
select
  b.arn as resource,
  case
    when d.name is null then 'ok'
    else 'alarm'
  end status,
  case
    when d.name is null then b.title || ' not publicly readable.'
    else b.title || ' publicly readable.'
  end reason
  
  , b.region, b.account_id
from
  aws_s3_bucket as b
  left join data as d on b.name = d.name;