Using Default Service Account

• Query id: 2775e169-e708-42a9-9305-b58aadd2c4dd
• Query name: Using Default Service Account
• Platform: Ansible
• Severity: Medium
• Category: Insecure Configurations
• CWE: 732
• URL: Github

Description

Instances must not be configured to use the Default Service Account, that has full access to all Cloud APIs, which means the attribute 'service_account_email' must be defined. Additionally, it must not be empty and must also not be a default Google Compute Engine service account.
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

#this is a problematic code where the query should report a result(s)
- name: create a instance1
  google.cloud.gcp_compute_instance:
    name: test_object1
    machine_type: n1-standard-1
    disks:
    - auto_delete: 'true'
      boot: 'true'
      source: "{{ disk }}"
    - auto_delete: 'true'
      interface: NVME
      type: SCRATCH
      initialize_params:
        disk_type: local-ssd
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    labels:
      environment: production
    network_interfaces:
    - network: "{{ network }}"
      access_configs:
      - name: External NAT
        nat_ip: "{{ address }}"
        type: ONE_TO_ONE_NAT
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    state: present
- name: create a instance2
  google.cloud.gcp_compute_instance:
    name: test_object2
    machine_type: n1-standard-1
    disks:
    - auto_delete: 'true'
      boot: 'true'
      source: "{{ disk }}"
    - auto_delete: 'true'
      interface: NVME
      type: SCRATCH
      initialize_params:
        disk_type: local-ssd
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    labels:
      environment: production
    network_interfaces:
    - network: "{{ network }}"
      access_configs:
      - name: External NAT
        nat_ip: "{{ address }}"
        type: ONE_TO_ONE_NAT
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_email: ""
    state: present
- name: create a instance3
  google.cloud.gcp_compute_instance:
    name: test_object3
    machine_type: n1-standard-1
    disks:
    - auto_delete: 'true'
      boot: 'true'
      source: "{{ disk }}"
    - auto_delete: 'true'
      interface: NVME
      type: SCRATCH
      initialize_params:
        disk_type: local-ssd
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    labels:
      environment: production
    network_interfaces:
    - network: "{{ network }}"
      access_configs:
      - name: External NAT
        nat_ip: "{{ address }}"
        type: ONE_TO_ONE_NAT
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_email: "admin"
    state: present
- name: create a instance4
  google.cloud.gcp_compute_instance:
    name: test_object4
    machine_type: n1-standard-1
    disks:
    - auto_delete: 'true'
      boot: 'true'
      source: "{{ disk }}"
    - auto_delete: 'true'
      interface: NVME
      type: SCRATCH
      initialize_params:
        disk_type: local-ssd
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    labels:
      environment: production
    network_interfaces:
    - network: "{{ network }}"
      access_configs:
      - name: External NAT
        nat_ip: "{{ address }}"
        type: ONE_TO_ONE_NAT
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_email: "admin@developer.gserviceaccount.com"
    state: present

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

#this code is a correct code for which the query should not find any result
- name: create a instance
  google.cloud.gcp_compute_instance:
    name: test_object
    machine_type: n1-standard-1
    disks:
    - auto_delete: 'true'
      boot: 'true'
      source: '{{ disk }}'
    - auto_delete: 'true'
      interface: NVME
      type: SCRATCH
      initialize_params:
        disk_type: local-ssd
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    labels:
      environment: production
    network_interfaces:
    - network: '{{ network }}'
      access_configs:
      - name: External NAT
        nat_ip: '{{ address }}'
        type: ONE_TO_ONE_NAT
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_email: admin@admin.com
    state: present