gcloud-org-service-account-key-upload: Service Account Key Upload Not Disabled

id: gcloud-org-service-account-key-upload

info:
  name: Service Account Key Upload Not Disabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that user-managed service account key upload is disabled within your Google Cloud project, folder, or the entire organization, through the "Disable Service Account Key Upload" organization policy. This allows you to control the upload process of unmanaged long-term credentials for your Cloud IAM service accounts. By default, users can upload keys to service accounts based on their Cloud IAM roles and permissions.
  impact: |
    User-managed keys are extremely powerful credentials and they can pose a security risk if not managed correctly. If compromised, anyone with these credentials can access GCP resources through the associated service account.
  remediation: |
    Enable the "Disable Service Account Key Upload" policy at the organization level using the 'gcloud alpha resource-manager org-policies enable-enforce' command with the iam.disableServiceAccountKeyUpload constraint.
  reference:
    - https://www.trendmicro.com/cloudoneconformity/knowledge-base/gcp/ResourceManager/disable-service-account-key-upload.html
    - https://cloud.google.com/resource-manager/docs/organization-policy/org-policy-constraints
  tags: cloud,devops,gcp,gcloud,resourcemanager,security,iam,service-account,gcp-cloud-config

flow: |
  code(1)
  for(let orgId of iterate(template.orgIds)){
    set("orgId", orgId)
    code(2)
  }

self-contained: true

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

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

  - engine:
      - sh
      - bash
    source: |
      gcloud alpha resource-manager org-policies describe iam.disableServiceAccountKeyUpload --organization=$orgId --effective --format="json(booleanPolicy)"

    matchers:
      - type: word
        words:
          - "{}"

    extractors:
      - type: dsl
        dsl:
          - '"Organization " + orgId + " has not disabled service account key upload, allowing users to upload unmanaged keys"'
# digest: 4a0a004730450220466125403fe640c356d99f8bbabbf2fe9bb980180876f87368ca00409c083f1a022100800670e74ee332bed168dcb2c15519dfbbbe3578b1ce4d66285a8a2db4ed1166:922c64590222798bb761d5b6d8e72950