#!/usr/bin/env bash

# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.
CHECK_ID_extra7134="7.134"
CHECK_TITLE_extra7134="[extra7134] Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to FTP ports 20 or 21 (Not Scored) (Not part of CIS benchmark)"
CHECK_SCORED_extra7134="NOT_SCORED"
CHECK_TYPE_extra7134="EXTRA"
CHECK_SEVERITY_extra7134="High"
CHECK_ASFF_RESOURCE_TYPE_extra7134="AwsEc2SecurityGroup"
CHECK_ALTERNATE_check7134="extra7134"
CHECK_SERVICENAME_extra7134="ec2"
CHECK_RISK_extra7134='If Security groups are not properly configured the attack surface is increased. '
CHECK_REMEDIATION_extra7134='Use a Zero Trust approach. Narrow ingress traffic as much as possible. Consider north-south as well as east-west traffic.'
CHECK_DOC_extra7134='https://docs.aws.amazon.com/vpc/latest/userguide/VPC_SecurityGroups.html'
CHECK_CAF_EPIC_extra7134='Infrastructure Security'

extra7134(){
  for regx in $REGIONS; do
    SG_LIST=$($AWSCLI ec2 describe-security-groups --query 'SecurityGroups[?length(IpPermissions[?((FromPort==null && ToPort==null) || (FromPort==`20` && ToPort==`21`)) && (contains(IpRanges[].CidrIp, `0.0.0.0/0`) || contains(Ipv6Ranges[].CidrIpv6, `::/0`))]) > `0`].{GroupId:GroupId}' $PROFILE_OPT --region $regx --output text)
    if [[ $SG_LIST ]];then
      for SG in $SG_LIST;do
        textFail "$regx: Found Security Group: $SG open to 0.0.0.0/0 for FTP ports" "$regx"
      done
    else
      textPass "$regx: No Security Groups found with any port open to 0.0.0.0/0 for FTP ports" "$regx"
    fi
  done
}