#!/usr/bin/env bash

# Prowler - the handy cloud security tool (copyright 2018) 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_extra7131="7.131"
CHECK_TITLE_extra7131="[extra7131] Ensure RDS instances have minor version upgrade enabled"
CHECK_SCORED_extra7131="NOT_SCORED"
CHECK_CIS_LEVEL_extra7131="EXTRA"
CHECK_SEVERITY_extra7131="Low"
CHECK_ASFF_RESOURCE_TYPE_extra7131="AwsRdsDbInstance"
CHECK_ALTERNATE_check7131="extra7131"
CHECK_SERVICENAME_extra7131="rds"
CHECK_RISK_extra7131='Auto Minor Version Upgrade is a feature that you can enable to have your database automatically upgraded when a new minor database engine version is available. Minor version upgrades often patch security vulnerabilities and fix bugs; and therefor should be applied.'
CHECK_REMEDIATION_extra7131='Enable auto minor version upgrade for all databases and environments.'
CHECK_DOC_extra7131='https://aws.amazon.com/blogs/database/best-practices-for-upgrading-amazon-rds-to-major-and-minor-versions-of-postgresql/'
CHECK_CAF_EPIC_extra7131='Infrastructure Security'

extra7131(){
  for regx in $REGIONS; do
    # LIST_OF_RDS_PUBLIC_INSTANCES=$($AWSCLI rds describe-db-instances $PROFILE_OPT --region $regx --query 'DBInstances[?PubliclyAccessible==`true` && DBInstanceStatus==`"available"`].[DBInstanceIdentifier,Endpoint.Address]' --output text)
    LIST_OF_RDS_INSTANCES=$($AWSCLI rds describe-db-instances $PROFILE_OPT --region $regx --query 'DBInstances[*].[DBInstanceIdentifier,AutoMinorVersionUpgrade]'  --output text 2>&1)
    if [[ $(echo "$LIST_OF_RDS_INSTANCES" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
        textInfo "$regx: Access Denied trying to describe DB instances" "$regx"
        continue
    fi
    if [[ $LIST_OF_RDS_INSTANCES ]];then
      while read -r rds_instance;do
        RDS_NAME=$(echo $rds_instance | awk '{ print $1; }')
        RDS_AUTOMINORUPGRADE_FLAG=$(echo $rds_instance | awk '{ print $2; }')
        if [[ $RDS_AUTOMINORUPGRADE_FLAG == "True" ]];then
            textPass "$regx: RDS instance: $RDS_NAME is has minor version upgrade enabled" "$regx" "$RDS_NAME"
        else
            textFail "$regx: RDS instance: $RDS_NAME does not have minor version upgrade enabled" "$regx" "$RDS_NAME"
        fi
      done <<< "$LIST_OF_RDS_INSTANCES"
      else
        textInfo "$regx: no RDS instances found" "$regx" "$RDS_NAME"
    fi
  done
}
