Query: vpc_default_security_group_restricts_all_traffic

select
  address as resource,
  case
    when (attributes_std -> 'egress') is null and (attributes_std -> 'ingress') is null then 'ok'
    else 'alarm'
  end as status,
  case
    when (attributes_std -> 'ingress') is not null and (attributes_std -> 'egress') is not null then 'Default security group ' || split_part(address, '.', 2) || ' has inbound and outbound rules'
    when (attributes_std -> 'ingress') is not null and (attributes_std -> 'egress') is null then 'Default security group ' || split_part(address, '.', 2) || ' has inbound rules'
    when (attributes_std -> 'ingress') is null and (attributes_std -> 'egress') is not null then 'Default security group ' || split_part(address, '.', 2) || ' has outbound rules'
    else 'Default security group ' || split_part(address, '.', 2) || ' has no inbound or outbound rules'
  end || '.' as reason
  
  , path || ':' || start_line
from
  terraform_resource
where
  type = 'aws_default_security_group';