Serial Ports Are Enabled For VM Instances

Query id: c6fc6f29-dc04-46b6-99ba-683c01aff350
Query name: Serial Ports Are Enabled For VM Instances
Platform: Ansible
Severity: Medium
Category: Networking and Firewall
URL: Github

Description¶

Google Compute Engine VM instances should not enable serial ports. When enabled, anyone can access your VM, if they know the username, project ID, SSH key, instance name and zone
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Positive test num. 1 - yaml file

- name: serial_enabled
  google.cloud.gcp_compute_instance:
    metadata:
      serial-port-enable: yes
    zone: us-central1-a
    auth_kind: serviceaccount

Code samples without security vulnerabilities¶

Negative test num. 1 - yaml file

- name: serial_disabled
  google.cloud.gcp_compute_instance:
    metadata:
      serial-port-enabled: no
    zone: us-central1-a
    auth_kind: serviceaccount
- name: serial_undefined
  google.cloud.gcp_compute_instance:
    metadata:
      startup-script-url: gs:://graphite-playground/bootstrap.sh
      cost-center: '12345'
    zone: us-central1-a
    auth_kind: serviceaccount