RDP Access Is Not Restricted

• Query id: 75418eb9-39ec-465f-913c-6f2b6a80dc77
• Query name: RDP Access Is Not Restricted
• Platform: Ansible
• Severity: Medium
• Category: Networking and Firewall
• URL: Github

Description

Check if the Google compute firewall allows unrestricted RDP access. Allowed ports should not contain RDP port 3389
Documentation

Code samples

Code samples with security vulnerabilities

Postitive test num. 1 - yaml file

- name: rdp_in_range
  google.cloud.gcp_compute_firewall:
    name: test_object
    source_ranges:
      - "0.0.0.0/0"
    allowed:
      - ip_protocol: tcp
        ports:
          - "22"
          - "80"
          - "8080"
          - "2000-4000"
    target_tags:
      - test-ssh-server
      - staging-ssh-server
    source_tags:
      - test-ssh-clients
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
- name: rdp_in_port
  google.cloud.gcp_compute_firewall:
    name: test_object
    source_ranges:
      - "0.0.0.0/0"
    allowed:
      - ip_protocol: tcp
        ports:
          - "22"
          - "80"
          - "3389"
    target_tags:
      - test-ssh-server
      - staging-ssh-server
    source_tags:
      - test-ssh-clients
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

- name: create a firewall
  google.cloud.gcp_compute_firewall:
    name: test_object
    allowed:
    - ip_protocol: tcp
      ports:
      - '80'
    target_tags:
    - test-ssh-server
    - staging-ssh-server
    source_tags:
    - test-ssh-clients
    project: test_project
    auth_kind: serviceaccount
    service_account_file: /tmp/auth.pem
    state: present