#!/usr/bin/env bash

# Prowler - the handy cloud security tool (c) by Toni de la Fuente
#
# This Prowler check is licensed under a
# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
#
# You should have received a copy of the license along with this
# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.

CHECK_ID_check43="4.3,4.03"
CHECK_TITLE_check43="[check43] Ensure the default security group of every VPC restricts all traffic (Scored)"
CHECK_SCORED_check43="SCORED"
CHECK_TYPE_check43="LEVEL2"
CHECK_ALTERNATE_check403="check43"

check43(){
  # "Ensure the default security group of every VPC restricts all traffic (Scored)"
  for regx in $REGIONS; do
    CHECK_SGDEFAULT_IDS=$($AWSCLI ec2 describe-security-groups $PROFILE_OPT --region $regx --filters Name=group-name,Values='default' --query 'SecurityGroups[*].GroupId[]' --output text)
    for CHECK_SGDEFAULT_ID in $CHECK_SGDEFAULT_IDS; do
      CHECK_SGDEFAULT_ID_OPEN=$($AWSCLI ec2 describe-security-groups $PROFILE_OPT --region $regx --group-ids $CHECK_SGDEFAULT_ID --query 'SecurityGroups[*].{IpPermissions:IpPermissions,IpPermissionsEgress:IpPermissionsEgress,GroupId:GroupId}' --output text |egrep '0.0.0.0|\:\:\/0')
      if [[ $CHECK_SGDEFAULT_ID_OPEN ]];then
        textFail "Default Security Groups ($CHECK_SGDEFAULT_ID) found that allow 0.0.0.0 IN or OUT traffic in Region $regx" "$regx"
      else
        textPass "No Default Security Groups ($CHECK_SGDEFAULT_ID) open to 0.0.0.0 found in Region $regx" "$regx"
      fi
    done
  done
}