turbot/azure_compliance

Query: network_security_group_restrict_inbound_icmp_port

Usage

powerpipe query azure_compliance.query.network_security_group_restrict_inbound_icmp_port

SQL

with unrestricted_inbound as (
select
distinct name sg_name
from
azure_network_security_group nsg,
jsonb_array_elements(security_rules || default_security_rules ) sg,
jsonb_array_elements_text(
case
when jsonb_array_length(sg -> 'properties' -> 'destinationPortRanges') > 0 then (sg -> 'properties' -> 'destinationPortRanges')
else jsonb_build_array(sg -> 'properties' -> 'destinationPortRange')
end ) as dport,
jsonb_array_elements_text(
case
when jsonb_array_length(sg -> 'properties' -> 'sourceAddressPrefixes') > 0 then (sg -> 'properties' -> 'sourceAddressPrefixes')
else jsonb_build_array(sg -> 'properties' -> 'sourceAddressPrefix')
end ) as sip
where
sg -> 'properties' ->> 'access' = 'Allow'
and sg -> 'properties' ->> 'direction' = 'Inbound'
and (sg -> 'properties' ->> 'protocol' ilike 'ICMP' or sg -> 'properties' ->> 'protocol' = '*')
and sip in ('*', '0.0.0.0', '0.0.0.0/0', 'Internet', 'any', '<nw>/0', '/0')
and (
dport = '*'
or (
dport like '%-%'
and (
split_part(dport, '-', 1) :: integer = 0
and split_part(dport, '-', 2) :: integer = 65535
)
)
)
)
select
sg.id resource,
case
when nsg.sg_name is null then 'ok'
else 'alarm'
end as status,
case
when nsg.sg_name is null then sg.title || ' restricts ICMP access from internet.'
else sg.title || ' allows ICMP access from internet.'
end as reason
, sg.resource_group as resource_group
, sub.display_name as subscription
from
azure_network_security_group sg
left join unrestricted_inbound nsg on nsg.sg_name = sg.name
join azure_subscription sub on sub.subscription_id = sg.subscription_id;

Controls

The query is being used by the following controls: