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40 lines
2.0 KiB
Bash
40 lines
2.0 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_extra771="7.71"
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CHECK_TITLE_extra771="[extra771] Check if S3 buckets have policies which allow WRITE access (Not Scored) (Not part of CIS benchmark)"
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CHECK_SCORED_extra771="NOT_SCORED"
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CHECK_TYPE_extra771="EXTRA"
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CHECK_ALTERNATE_check771="extra771"
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extra771(){
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LIST_OF_BUCKETS=$($AWSCLI s3api list-buckets $PROFILE_OPT --query Buckets[*].Name --output text|xargs -n1)
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if [[ $LIST_OF_BUCKETS ]]; then
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for bucket in $LIST_OF_BUCKETS;do
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BUCKET_POLICY_STATEMENTS=$($AWSCLI s3api $PROFILE_OPT get-bucket-policy --bucket $bucket --output json --query Policy 2>&1)
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if [[ $BUCKET_POLICY_STATEMENTS == *GetBucketPolicy* ]]; then
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textInfo "Bucket policy does not exist for bucket $bucket"
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else
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BUCKET_POLICY_BAD_STATEMENTS=$(echo $BUCKET_POLICY_STATEMENTS | jq --arg arn "arn:aws:s3:::$bucket" 'fromjson | .Statement[]|select(.Effect=="Allow" and (((.Principal|type == "object") and .Principal.AWS == "*") or ((.Principal|type == "string") and .Principal == "*")) and (.Action|startswith("s3:Put") or startswith("s3:*")))')
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if [[ $BUCKET_POLICY_BAD_STATEMENTS != "" ]]; then
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textFail "Bucket $bucket allows public write: $BUCKET_POLICY_BAD_STATEMENTS"
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else
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textPass "Bucket $bucket has S3 bucket policy which does not allow public write access"
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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 "No S3 Buckets found"
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fi
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}
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