Unenforced SSL/TLS on Cloud CDN Backend Service Origins

ID: gcloud-cdn-tls-unenforced

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,cloud-cdn,gcp-cloud-config

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.

YAML Source

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

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "cloud/gcp/cdn/gcloud-cdn-tls-unenforced.yaml"

View on Github