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https://github.com/ghndrx/prowler.git
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67 lines
3.8 KiB
Bash
67 lines
3.8 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_extra7172="7.172"
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CHECK_TITLE_extra7172="[extra7172] Check if S3 buckets have ACLs enabled"
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CHECK_SCORED_extra7172="NOT_SCORED"
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CHECK_CIS_LEVEL_extra7172="EXTRA"
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CHECK_SEVERITY_extra7172="Medium"
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CHECK_ASFF_RESOURCE_TYPE_extra7172="AwsS3Bucket"
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CHECK_ALTERNATE_check7172="extra7172"
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CHECK_SERVICENAME_extra7172="s3"
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CHECK_RISK_extra7172='S3 ACLs are a legacy access control mechanism that predates IAM. IAM and bucket policies are currently the preferred methods.'
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CHECK_REMEDIATION_extra7172='Ensure that S3 ACLs are disabled (BucketOwnerEnforced). Use IAM policies and bucket policies to manage access.'
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CHECK_DOC_extra7172='https://docs.aws.amazon.com/AmazonS3/latest/userguide/about-object-ownership.html'
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CHECK_CAF_EPIC_extra7172='Logging and Monitoring'
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extra7172(){
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# "Check if S3 buckets have server access logging enabled"
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LIST_OF_BUCKETS=$("${AWSCLI}" s3api list-buckets ${PROFILE_OPT} --query Buckets[*].Name --region "${REGION}" --output text 2>&1)
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if grep -q -E 'AccessDenied|UnauthorizedOperation|AuthorizationError' <<< "$LIST_OF_BUCKETS"; then
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textInfo "${REGION}: Access Denied Trying to list buckets" "${REGION}"
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exit
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fi
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if [[ $LIST_OF_BUCKETS ]]; then
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for bucket in $LIST_OF_BUCKETS;do
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# Recover Bucket region
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BUCKET_REGION=$("${AWSCLI}" ${PROFILE_OPT} s3api get-bucket-location --bucket "${bucket}" --region "${REGION}" --query LocationConstraint --output text)
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if grep -q -E 'AccessDenied|UnauthorizedOperation|AuthorizationError' <<< "${BUCKET_REGION}"; then
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textInfo "${REGION}: Access Denied trying to get bucket location for ${bucket}" "${REGION}"
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fi
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# If None use default region
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if [[ "${BUCKET_REGION}" == "None" ]]; then
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BUCKET_REGION="${REGION}"
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fi
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BUCKET_ACLS_DISABLED=$(${AWSCLI} ${PROFILE_OPT} s3api get-bucket-ownership-controls --bucket "${bucket}" --region "${BUCKET_REGION}" --output text 2>&1)
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if grep -q -E 'AccessDenied|UnauthorizedOperation|AuthorizationError' <<< "${BUCKET_ACLS_DISABLED}" ; then
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textInfo "${BUCKET_REGION}: Access Denied Trying to Get Bucket Ownership Controls for ${bucket}" "${BUCKET_REGION}" "${bucket}"
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continue
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elif grep -q -E 'IllegalLocationConstraintException' <<< "${BUCKET_ACLS_DISABLED}"; then
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textInfo "${BUCKET_REGION}: Location Constraint Trying to Get Bucket Ownership Controls for ${bucket}" "${BUCKET_REGION}" "${bucket}"
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continue
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fi
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if grep -q "BucketOwnerEnforced" <<< "${BUCKET_ACLS_DISABLED}"; then
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textPass "${BUCKET_REGION}: Bucket ${bucket} has bucket ACLs disabled!" "${BUCKET_REGION}" "${bucket}"
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elif grep -q "BucketOwnerPreferred" <<< "${BUCKET_ACLS_DISABLED}"; then
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textFail "${BUCKET_REGION}: Bucket ${bucket} has bucket ACLs enabled!" "${BUCKET_REGION}" "${bucket}"
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elif grep -q "OwnershipControlsNotFoundError" <<< "${BUCKET_ACLS_DISABLED}"; then
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textFail "${BUCKET_REGION}: Bucket ${bucket} has bucket ACLs enabled!" "${BUCKET_REGION}" "${bucket}"
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else
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textFail "${BUCKET_REGION}: Bucket ${bucket} returned an unknown error" "${BUCKET_REGION}" "${bucket}"
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fi
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done
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else
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textInfo "${REGION}: No S3 Buckets found" "${REGION}"
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fi
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}
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