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49 lines
3.1 KiB
Bash
49 lines
3.1 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (copyright 2019) by Toni de la Fuente
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy
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# of the License at http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software distributed
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# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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# CONDITIONS OF ANY KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations under the License.
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CHECK_ID_check44="4.4"
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CHECK_TITLE_check44="[check44] Ensure routing tables for VPC peering are \"least access\""
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CHECK_SCORED_check44="NOT_SCORED"
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CHECK_CIS_LEVEL_check44="LEVEL2"
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CHECK_SEVERITY_check44="Medium"
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CHECK_ASFF_TYPE_check44="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
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CHECK_ASFF_RESOURCE_TYPE_check44="AwsEc2Vpc"
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CHECK_ALTERNATE_check404="check44"
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CHECK_SERVICENAME_check44="vpc"
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CHECK_RISK_check44='Being highly selective in peering routing tables is a very effective way of minimizing the impact of breach as resources outside of these routes are inaccessible to the peered VPC.'
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CHECK_REMEDIATION_check44='Review routing tables of peered VPCs for whether they route all subnets of each VPC and whether that is necessary to accomplish the intended purposes for peering the VPCs.'
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CHECK_DOC_check44='https://docs.aws.amazon.com/vpc/latest/peering/peering-configurations-partial-access.html'
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CHECK_CAF_EPIC_check44='Infrastructure Security'
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check44(){
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# "Ensure routing tables for VPC peering are \"least access\" (Not Scored)"
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for regx in $REGIONS; do
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LIST_OF_VPCS_PEERING_CONNECTIONS=$($AWSCLI ec2 describe-vpc-peering-connections --output text $PROFILE_OPT --region $regx --query 'VpcPeeringConnections[*].VpcPeeringConnectionId' 2>&1| sort | paste -s -d" " - )
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if [[ $(echo "$LIST_OF_VPCS_PEERING_CONNECTIONS" | grep -E 'AccessDenied|UnauthorizedOperation') ]]; then
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textInfo "$regx: Access Denied trying to describe vpc peering connections" "$regx"
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continue
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fi
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if [[ $LIST_OF_VPCS_PEERING_CONNECTIONS ]];then
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textInfo "$regx: $LIST_OF_VPCS_PEERING_CONNECTIONS - review routing tables" "$regx" "$LIST_OF_VPCS_PEERING_CONNECTIONS"
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#LIST_OF_VPCS=$($AWSCLI ec2 describe-vpcs $PROFILE_OPT --region $regx --query 'Vpcs[*].VpcId' --output text)
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#aws ec2 describe-route-tables --filter "Name=vpc-id,Values=vpc-0213e864" --query "RouteTables[*].{RouteTableId:RouteTableId, VpcId:VpcId, Routes:Routes, AssociatedSubnets:Associations[*].SubnetId}" $PROFILE_OPT --region $regx
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# for vpc in $LIST_OF_VPCS; do
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# VPCS_WITH_PEERING=$($AWSCLI ec2 describe-route-tables --filter "Name=vpc-id,Values=$vpc" $PROFILE_OPT --region $regx --query "RouteTables[*].{RouteTableId:RouteTableId, VpcId:VpcId, Routes:Routes, AssociatedSubnets:Associations[*].SubnetId}" |grep GatewayId|grep pcx-)
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# done
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#echo $VPCS_WITH_PEERING
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else
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textPass "$regx: No VPC peering found" "$regx" "$LIST_OF_VPCS_PEERING_CONNECTIONS"
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fi
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done
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}
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