firehose-server-side-encryption: Firehose Delivery Stream Server-Side Encryption - Disabled

id: firehose-server-side-encryption

info:
  name: Firehose Delivery Stream Server-Side Encryption - Disabled
  author: DhiyaneshDK
  severity: high
  description: |
    Ensure that your Amazon Kinesis Data Firehose delivery streams are encrypted using Server-Side Encryption.
  impact: |
    Disabling server-side encryption for Firehose delivery streams can result in unencrypted data being stored, exposing sensitive information to unauthorized access and increasing the risk of data breaches.
  remediation: |
    Enable server-side encryption for Firehose delivery streams to ensure that data is securely encrypted at rest, protecting sensitive information from unauthorized access.
  reference:
    - https://www.trendmicro.com/cloudoneconformity-staging/knowledge-base/aws/Firehose/delivery-stream-encrypted-with-kms-customer-master-keys.html
    - https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingKMSEncryption.html
  tags: cloud,devops,aws,amazon,firehose,aws-cloud-config

variables:
  region: "us-west-2"

flow: |
  code(1)
  for(let DeliveryStreamNames of iterate(template.deliverys)){
    set("delivery", DeliveryStreamNames)
    code(2)
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      aws firehose list-delivery-streams --region $region --query 'DeliveryStreamNames' --output json

    extractors:
      - type: json
        name: deliverys
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
        aws firehose describe-delivery-stream --region $region --delivery-stream-name $delivery --query 'DeliveryStreamDescription.DeliveryStreamEncryptionConfiguration.KeyType' --output json

    matchers:
      - type: word
        words:
          - "null"

    extractors:
      - type: dsl
        dsl:
          - '"Firehose delivery stream " + delivery + " is not encrypted using SSE"'
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