gcloud-sql-ssl-tls-connections-not-enforced: Allow SSL/TLS Connections Only

id: gcloud-sql-ssl-tls-connections-not-enforced

info:
  name: Allow SSL/TLS Connections Only
  author: princechaddha
  severity: medium
  description: |
    Ensure that all incoming connections to your Cloud SQL database instances are encrypted with SSL/TLS to protect against eavesdropping and unauthorized access. The SSL enforcement mode must be set to "ENCRYPTED_ONLY" to enforce secure connections.
  impact: |
    Allowing unencrypted connections can expose sensitive data to interception and increase the risk of unauthorized access.
  remediation: |
    Set the SSL enforcement mode to "ENCRYPTED_ONLY" for all Cloud SQL database instances to ensure all incoming connections use SSL/TLS encryption.
  reference:
    - https://cloud.google.com/sql/docs/mysql/configure-ssl
  tags: cloud,devops,gcp,gcloud,google-cloud-sql,networking,security,ssl,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let sqlInstance of iterate(template.sqlInstances)){
      set("sqlInstance", sqlInstance)
      code(3)
    }
  }

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 sql instances list --project $projectId --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud sql instances describe $sqlInstance --project $projectId --format="value(settings.ipConfiguration.sslMode)"

    matchers:
      - type: word
        words:
          - 'ALLOW_UNENCRYPTED_AND_ENCRYPTED'

    extractors:
      - type: dsl
        dsl:
          - '"The SQL instance " + sqlInstance + " in project " + projectId + " does not enforce SSL/TLS connections and allows unencrypted access"'
# digest: 4a0a0047304502210099dbe79a178ef1807f290c2341ac97fdb8b83392e06b4bb3e88e269aa3c73cbd022000cd1099abfac9f0774af5535a19731a7f4c9921d8da69555fa0df11f435d474:922c64590222798bb761d5b6d8e72950