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42 lines
2.4 KiB
Bash
42 lines
2.4 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_check41="4.1"
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CHECK_TITLE_check41="[check41] Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to port 22"
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CHECK_SCORED_check41="SCORED"
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CHECK_TYPE_check41="LEVEL2"
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CHECK_SEVERITY_check41="High"
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CHECK_ASFF_TYPE_check41="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
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CHECK_ASFF_RESOURCE_TYPE_check41="AwsEc2SecurityGroup"
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CHECK_ALTERNATE_check401="check41"
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CHECK_ASFF_COMPLIANCE_TYPE_check41="ens-mp.com.4.aws.sg.4"
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CHECK_SERVICENAME_check41="ec2"
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CHECK_RISK_check41='Even having a perimeter firewall; having security groups open allows any user or malware with vpc access to scan for well known and sensitive ports and gain access to instance.'
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CHECK_REMEDIATION_check41='Apply Zero Trust approach. Implement a process to scan and remediate unrestricted or overly permissive security groups. Recommended best practices is to narrow the definition for the minimum ports required.'
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CHECK_DOC_check41='https://docs.aws.amazon.com/eks/latest/userguide/sec-group-reqs.html'
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CHECK_CAF_EPIC_check41='Infrastructure Security'
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check41(){
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# "Ensure no security groups allow ingress from 0.0.0.0/0 or ::/0 to port 22 (Scored)"
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for regx in $REGIONS; do
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SG_LIST=$($AWSCLI ec2 describe-security-groups --query 'SecurityGroups[?length(IpPermissions[?((FromPort==null && ToPort==null) || (FromPort<=`22` && ToPort>=`22`)) && (contains(IpRanges[].CidrIp, `0.0.0.0/0`) || contains(Ipv6Ranges[].CidrIpv6, `::/0`))]) > `0`].{GroupId:GroupId}' $PROFILE_OPT --region $regx --output text)
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if [[ $SG_LIST ]];then
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for SG in $SG_LIST;do
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textFail "$regx: Found Security Group: $SG open to 0.0.0.0/0" "$regx" "$SG"
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done
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else
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textPass "$regx: No Security Groups found with port 22 TCP open to 0.0.0.0/0" "$regx" "$SG"
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fi
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done
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}
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