Query: ec2_instance_no_iam_role_with_database_management_write_access

with iam_roles as (
  select
    r.arn as role_arn,
    i.arn as intance_arn
  from
    aws_iam_role as r,
    jsonb_array_elements_text(instance_profile_arns) as p
    left join aws_ec2_instance as i on p = i.iam_instance_profile_arn
  where
    i.arn is not null
),
iam_role_with_permission as (
  select
    arn
  from
    aws_iam_role,
    jsonb_array_elements(assume_role_policy_std -> 'Statement') as s,
    jsonb_array_elements_text(s -> 'Principal' -> 'Service') as service,
    jsonb_array_elements_text(s -> 'Action') as action
  where
    arn in (
      select
        role_arn
      from
        iam_roles
    )
    and s ->> 'Effect' = 'Allow'
    and service = 'ec2.amazonaws.com'
    and (
      (
        action in (
          'rds:modifydbcluster',
          'rds:modifydbclusterendpoint',
          'rds:modifydbinstance',
          'rds:modifydbsnapshot',
          'rds:modifyglobalcluster',
          'dynamodb:updateitem',
          'dynamodb:updatetable',
          'memorydb:updatecluster',
          'neptune-db:resetdatabase',
          'neptune-db:writedataviaquery',
          'docdb-elastic:updatecluster',
          'elasticache:modifycachecluster',
          'cassandra:alter',
          'cassandra:modify',
          'qldb:executestatement',
          'qldb:partiqlupdate',
          'qldb:sendcommand',
          'qldb:updateledger',
          'redshift:modifycluster',
          'redshift:modifyclustersnapshot',
          'redshift:modifyendpointaccess',
          'timestream:updatedatabase',
          'timestream:updatetable',
          'timestream:writerecords',
          '*:*'
        )
      )
    )
)
select
  i.arn as resource,
  case
    when p.arn is null then 'ok'
    else 'alarm'
  end status,
  case
    when p.arn is null then title || ' has no database management write level access.'
    else title || ' has database management write level access.'
  end as reason,
  i.account_id
from
  aws_ec2_instance as i
  left join iam_roles as r on r.intance_arn = i.arn
  left join iam_role_with_permission as p on p.arn = r.role_arn;