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59 lines
3.1 KiB
Bash
59 lines
3.1 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_extra731="7.31"
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CHECK_TITLE_extra731="[extra731] Check if SNS topics have policy set as Public"
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CHECK_SCORED_extra731="NOT_SCORED"
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CHECK_CIS_LEVEL_extra731="EXTRA"
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CHECK_SEVERITY_extra731="Critical"
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CHECK_ASFF_RESOURCE_TYPE_extra731="AwsSnsTopic"
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CHECK_ALTERNATE_check731="extra731"
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CHECK_SERVICENAME_extra731="sns"
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CHECK_RISK_extra731='Publicly accessible services could expose sensitive data to bad actors.'
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CHECK_REMEDIATION_extra731='Ensure there is a business requirement for service to be public.'
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CHECK_DOC_extra731='https://docs.aws.amazon.com/config/latest/developerguide/sns-topic-policy.html'
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CHECK_CAF_EPIC_extra731='Infrastructure Security'
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extra731(){
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for regx in $REGIONS; do
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LIST_SNS=$($AWSCLI sns list-topics $PROFILE_OPT --region $regx --query Topics --output text 2>&1|grep -v ^None )
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if [[ $(echo "$LIST_SNS" | grep -E 'AccessDenied|UnauthorizedOperation|AuthorizationError') ]]; then
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textInfo "$regx: Access Denied trying to list topics" "$regx"
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continue
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fi
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if [[ $LIST_SNS ]]; then
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for topic in $LIST_SNS; do
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SHORT_TOPIC=$(echo $topic| cut -d: -f6)
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SNS_POLICY=$($AWSCLI sns get-topic-attributes --topic-arn $topic $PROFILE_OPT --region $regx --query Attributes.Policy 2>/dev/null)
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SNS_POLICY_ALLOW_ALL=$(echo $SNS_POLICY \
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| jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
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if [[ $SNS_POLICY_ALLOW_ALL ]]; then
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SNS_POLICY_ALLOW_ALL_WITHOUT_CONDITION=$(echo $SNS_POLICY \
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| jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*") | select(has("Condition") | not)')
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if [[ $SNS_POLICY_ALLOW_ALL_WITHOUT_CONDITION ]]; then
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SNS_POLICY_ALLOW_ALL_WITHOUT_CONDITION_DETAILS=$(echo $SNS_POLICY_ALLOW_ALL_WITHOUT_CONDITION \
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| jq '"[Principal: " + (.Principal|tostring) + " Action: " + (.Action|tostring) + "]"' )
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textFail "$regx: SNS topic $SHORT_TOPIC's policy with public access" "$regx" "$SHORT_TOPIC"
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else
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textPass "$regx: SNS topic $SHORT_TOPIC's policy with public access but has a Condition" "$regx" "$SHORT_TOPIC"
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fi
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else
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textPass "$regx: SNS topic without public access" "$regx"
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fi
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done
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else
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textInfo "$regx: No SNS topic found" "$regx"
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fi
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done
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}
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