Control: VPC security groups should restrict ingress SSH access from 0.0.0.0/0

powerpipe control run aws_compliance.control.vpc_security_group_restrict_ingress_ssh_all

powerpipe login
powerpipe control run aws_compliance.control.vpc_security_group_restrict_ingress_ssh_all --share

with ingress_ssh_rules as (
  select
    group_id,
    count(*) as num_ssh_rules
  from
    aws_vpc_security_group_rule
  where
    type = 'ingress'
    and cidr_ipv4 = '0.0.0.0/0'
    and (
        ( ip_protocol = '-1'
        and from_port is null
        )
        or (
            from_port <= 22
            and to_port >= 22
        )
    )
  group by
    group_id
)
select
  arn as resource,
  case
    when ingress_ssh_rules.group_id is null then 'ok'
    else 'alarm'
  end as status,
  case
    when ingress_ssh_rules.group_id is null then sg.group_id || ' ingress restricted for SSH from 0.0.0.0/0.'
    else  sg.group_id || ' contains ' || ingress_ssh_rules.num_ssh_rules || ' ingress rule(s) allowing SSH from 0.0.0.0/0.'
  end as reason
  
  , region, account_id
from
  aws_vpc_security_group as sg
  left join ingress_ssh_rules on ingress_ssh_rules.group_id = sg.group_id;