prowler/checks/check_extra727

#!/usr/bin/env bash

# Prowler - the handy cloud security tool (copyright 2018) by Toni de la Fuente
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy
# of the License at http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed
# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
# CONDITIONS OF ANY KIND, either express or implied. See the License for the
# specific language governing permissions and limitations under the License.

CHECK_ID_extra727="7.27"
CHECK_TITLE_extra727="[extra727] Check if SQS queues have policy set as Public"
CHECK_SCORED_extra727="NOT_SCORED"
CHECK_CIS_LEVEL_extra727="EXTRA"
CHECK_SEVERITY_extra727="Critical"
CHECK_ASFF_RESOURCE_TYPE_extra727="AwsSqsQueue"
CHECK_ALTERNATE_check727="extra727"
CHECK_SERVICENAME_extra727="sqs"
CHECK_RISK_extra727='Sensitive information could be disclosed.'
CHECK_REMEDIATION_extra727='Review service with overly permissive policies. Adhere to Principle of Least Privilege.'
CHECK_DOC_extra727='https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-basic-examples-of-sqs-policies.html'
CHECK_CAF_EPIC_extra727='Infrastructure Security'

extra727(){
  for regx in $REGIONS; do
    LIST_SQS=$($AWSCLI sqs list-queues $PROFILE_OPT --region $regx --query QueueUrls --output text 2>&1|grep -v ^None )
    if [[ $(echo "$LIST_SQS" | grep -E 'AccessDenied|UnauthorizedOperation') ]]; then
        textInfo "$regx: Access Denied trying to list queues" "$regx"
        continue
    fi 
    if [[ $LIST_SQS ]]; then
      for queue in $LIST_SQS; do
        SQS_POLICY=$($AWSCLI sqs get-queue-attributes --queue-url $queue $PROFILE_OPT --region $regx --attribute-names All --query Attributes.Policy)
        if [[ "$SQS_POLICY" != "null" ]]; then
          SQS_POLICY_ALLOW_ALL=$(echo $SQS_POLICY \
            | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*")')
          if [[ $SQS_POLICY_ALLOW_ALL ]]; then
            SQS_POLICY_ALLOW_ALL_WITHOUT_CONDITION=$(echo $SQS_POLICY \
              | jq '. | fromjson' | jq '.Statement[] | select(.Effect=="Allow") | select(.Principal=="*" or .Principal.AWS=="*" or .Principal.CanonicalUser=="*") | select(has("Condition") | not)')
            if [[ $SQS_POLICY_ALLOW_ALL_WITHOUT_CONDITION ]]; then
              SQS_POLICY_ALLOW_ALL_WITHOUT_CONDITION_DETAILS=$(echo $SQS_POLICY_ALLOW_ALL_WITHOUT_CONDITION \
                | jq '"[Principal: " + (.Principal|tostring) + " Action: " + (.Action|tostring) + "]"' )
              textFail "$regx: SQS $queue queue policy with public access" "$regx" "$queue"
            else
              textInfo "$regx: SQS $queue queue policy with public access but has a Condition" "$regx" "$queue"
            fi
          else
            textPass "$regx: SQS $queue queue without public access" "$regx" "$queue"
          fi
        else
          textPass "$regx: SQS $queue queue without policy" "$regx" "$queue"
        fi
      done
    else
      textInfo "$regx: No SQS queues found" "$regx"
    fi
  done
}