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https://github.com/ghndrx/prowler.git
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77 lines
4.9 KiB
Bash
77 lines
4.9 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_extra779="7.79"
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CHECK_TITLE_extra779="[extra779] Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to Elasticsearch/Kibana ports 9200/9300/5601 (Not Scored) (Not part of CIS benchmark)"
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CHECK_SCORED_extra779="NOT_SCORED"
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CHECK_TYPE_extra779="EXTRA"
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CHECK_ALTERNATE_check779="extra779"
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extra779(){
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# if TEST_AUTHENTICATION has a value Prowler will try to access each ElasticSearch server to ports 9200/9300/5601
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# from the host where Prowler is running and will try to read indices or get kibana status
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TEST_ES_AUTHENTICATION=
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for regx in $REGIONS; do
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# crate a list of SG open to the world with port 9200 or 9300 or 5601
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SG_LIST=$($AWSCLI ec2 describe-security-groups $PROFILE_OPT --region $regx --output text \
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--query 'SecurityGroups[?length(IpPermissions[?((FromPort==null && ToPort==null) || (FromPort<=`9200` && ToPort>=`9200`) || (FromPort<=`9300` && ToPort>=`9300`)) || (FromPort<=`5601` && ToPort>=`5601 `) && (contains(IpRanges[].CidrIp, `0.0.0.0/0`) || contains(Ipv6Ranges[].CidrIpv6, `::/0`))]) > `0`].{GroupId:GroupId}')
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# in case of open security groups goes through each one
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if [[ $SG_LIST ]];then
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for sg in $SG_LIST;do
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# temp file store the list of instances IDs and public IP address if found
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TEMP_EXTRA779_FILE=$(mktemp -t prowler-${ACCOUNT_NUM}-es-domain.EXTRA779.XXXXXXXXXX)
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# finds instances with that open security group attached and get its public ip address (if it has one)
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$AWSCLI $PROFILE_OPT --region $regx ec2 describe-instances --filters Name=instance.group-id,Values=$sg --query 'Reservations[*].Instances[*].[InstanceId,PublicIpAddress]' --output text > $TEMP_EXTRA779_FILE
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# in case of exposed instances it does access checks
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if [[ -s "$TEMP_EXTRA779_FILE" ]];then
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while read instance eip ; do
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if [[ $TEST_ES_AUTHENTICATION ]];then
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if [[ "$eip" != "None" ]];then
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CHECH_AUTH_9200=$(curl -m 2 -s -X GET "http://$eip:9200/_cat/indices" | grep -v "not authorized" >/dev/null 2>&1 && echo "open" || echo "closed")
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# timeout 1 bash -c '(echo > /dev/tcp/'$eip'/9300) >/dev/null 2>&1 && echo "open" || echo "closed"'
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CHECH_AUTH_5601=$(curl -m 2 -s "http://$eip:5601/api/status" | jq .version.number | grep -v null >/dev/null 2>&1 && echo "open" || echo "closed")
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if [[ $CHECH_AUTH_9200 -eq "closed" ]];then
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textInfo "$regx: Found instance $instance with public IP $eip on Security Group: $sg with Elasticsearch $CHECH_AUTH_9200" "$regx"
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else
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textFail "$regx: Found instance $instance with public IP $eip on Security Group: $sg with Elasticsearch $CHECH_AUTH_9200" "$regx"
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fi
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if [[ $CHECH_AUTH_5601 -eq "closed" ]];then
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textInfo "$regx: Found instance $instance with public IP $eip on Security Group: $sg with Kibana $CHECH_AUTH_5601" "$regx"
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else
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textFail "$regx: Found instance $instance with public IP $eip on Security Group: $sg with Kibana $CHECH_AUTH_5601" "$regx"
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fi
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fi
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else
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if [[ "$eip" == "None" ]];then
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textInfo "$regx: Found instance $instance with private IP on Security Group: $sg" "$regx"
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else
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textFail "$regx: Found instance $instance with public IP $eip on Security Group: $sg open to 0.0.0.0/0 on for Elasticsearch/Kibana ports" "$regx"
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fi
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fi
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if [[ "$eip" == "None" ]];then
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textInfo "$regx: Found instance $instance with private IP on Security Group: $sg" "$regx"
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fi
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# done < <(cat $TEMP_EXTRA779_FILE | grep -v None$)
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done < <(cat $TEMP_EXTRA779_FILE)
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# while read instance eip ; do
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# textInfo "$regx: Found instance $instance with private IP on Security Group: $sg" "$regx"
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# done < <(cat $TEMP_EXTRA779_FILE | grep None$)
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fi
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rm -rf $TEMP_EXTRA779_FILE
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#textFail "$regx: Found Security Group: $sg open to 0.0.0.0/0 on for Elasticsearch ports" "$regx"
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done
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else
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textPass "$regx: No Security Groups found open to 0.0.0.0/0 for Elasticsearch/Kibana ports" "$regx"
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fi
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done
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}
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