gcloud-cdn-tls-unenforced: Unenforced SSL/TLS on Cloud CDN Backend Service Origins

id: gcloud-cdn-tls-unenforced

info:
  name: Unenforced SSL/TLS on Cloud CDN Backend Service Origins
  author: princechaddha
  severity: medium
  description: |
    Ensure that Google Cloud CDN backend service origins are using SSL/TLS certificates to enforce HTTPS in order to manage encrypted traffic. This helps to protect the integrity and confidentiality of the transmitted information.
  impact: |
    If SSL/TLS certificates are not enforced, the integrity and confidentiality of the transmitted information through Cloud CDN can be compromised, leading to potential data leaks and security breaches.
  remediation: |
    Configure SSL/TLS certificates for your Cloud CDN backend service origins to enforce HTTPS and ensure that all communications are securely encrypted.
  reference:
    - https://cloud.google.com/cdn/docs/using-https
  tags: cloud,devops,gcp,gcloud,cloud-cdn,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let service of iterate(template.services)){
      set("serviceName", service)
      code(3)
      code(4)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      gcloud projects list --format="json(projectId)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud compute url-maps list --project $projectId --format="json(name,defaultService)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud compute forwarding-rules list --project $projectId

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

  - engine:
      - sh
      - bash
    source: |
      gcloud compute forwarding-rules describe $forwardingRules --global --format="value(portRange)"

    matchers:
      - type: word
        words:
          - '80-80'

    extractors:
      - type: dsl
        dsl:
          - '"HTTP traffic allowed without SSL/TLS on service: " + serviceName + " in Project: " + projectId'
# digest: 490a0046304402201816c5925b439d4d82d194b0fb552913beb2e0db771ff47d6958979005d5ba7d022062305cca30ff33b8ea930373bac7689f188531b66aa798ad08af6e62eb6b6f11:922c64590222798bb761d5b6d8e72950