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50 lines
2.7 KiB
Bash
50 lines
2.7 KiB
Bash
#!/usr/bin/env bash
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# Prowler - the handy cloud security tool (copyright 2018) 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_extra7145="7.145"
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CHECK_TITLE_extra7145="[extra7145] Check if Lambda functions have policies which allow access to any AWS account"
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CHECK_SCORED_extra7145="NOT_SCORED"
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CHECK_CIS_LEVEL_extra7145="EXTRA"
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CHECK_SEVERITY_extra7145="Critical"
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CHECK_ASFF_RESOURCE_TYPE_extra7145="AwsLambda"
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CHECK_ALTERNATE_check7145="extra7145"
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CHECK_SERVICENAME_extra7145="lambda"
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CHECK_RISK_extra7145='Lambda function access to any AWS account may result security issues'
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CHECK_REMEDIATION_extra7145='Ensure Lambda function policiy does not allow access to any account'
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CHECK_DOC_extra7145='https://docs.aws.amazon.com/lambda/latest/dg/access-control-resource-based.html'
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CHECK_CAF_EPIC_extra7145='IAM'
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extra7145(){
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# "Check if lambda functions have policies which allow access to every aws account (Not Scored) (Not part of CIS benchmark)"
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for regx in $REGIONS; do
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LIST_OF_LAMBDA_FUNCTIONS=$($AWSCLI lambda list-functions $PROFILE_OPT --region $regx --query Functions[*].FunctionName --output text)
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if [[ $LIST_OF_LAMBDA_FUNCTIONS ]]; then
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for lambdaFunction in $LIST_OF_LAMBDA_FUNCTIONS;do
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FUNCTION_POLICY_STATEMENTS=$($AWSCLI lambda $PROFILE_OPT get-policy --region $regx --function-name $lambdaFunction --output json --query Policy 2>&1)
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if [[ $FUNCTION_POLICY_STATEMENTS == *ResourceNotFoundException* ]]; then
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textInfo "$regx: Lambda function $lambdaFunction doesn't have any policy" "$regx" "$lambdaFunction"
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else
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FUNCTION_POLICY_BAD_STATEMENTS=$(echo $FUNCTION_POLICY_STATEMENTS | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
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if [[ $FUNCTION_POLICY_BAD_STATEMENTS != "" ]]; then
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textFail "$regx: Lambda function $lambdaFunction allows public access to any AWS account" "$regx" "$lambdaFunction"
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else
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textPass "$regx: Lambda function $lambdaFunction has policy which doesn't allow access to everyone having an AWS account" "$regx" "$lambdaFunction"
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fi
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fi
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done
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else
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textInfo "$regx: No lambda functions found" "$regx"
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fi
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done
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}
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