GKE Using Default Service Account

• Query id: dc126833-125a-40fb-905a-ce5f2afde240
• Query name: GKE Using Default Service Account
• Platform: Ansible
• Severity: Medium
• Category: Insecure Defaults
• URL: Github

Description

Kubernetes Engine Clusters should not be configured to use the default service account
Documentation

Code samples

Code samples with security vulnerabilities

Postitive test num. 1 - yaml file

- name: create a cluster
  google.cloud.gcp_container_cluster:
    name: my-cluster
    initial_node_count: 2
    master_auth:
      username: cluster_admin
      password: my-secret-password
    node_config:
      machine_type: n1-standard-4
      disk_size_gb: 500
    location: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present

Postitive test num. 2 - yaml file

- name: create a cluster
  google.cloud.gcp_container_cluster:
    name: my-cluster
    initial_node_count: 2
    master_auth:
      username: cluster_admin
      password: my-secret-password
    node_config:
      machine_type: n1-standard-4
      disk_size_gb: 500
      service_account: "{{ default }}"
    location: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
- name: create a service account
  google.cloud.gcp_iam_service_account:
    name: sa-{{ resource_name.split("-")[-1] }}@graphite-playground.google.com.iam.gserviceaccount.com
    display_name: My Ansible test key
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
  register: default

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

- name: create a cluster
  google.cloud.gcp_container_cluster:
    name: my-cluster
    initial_node_count: 2
    master_auth:
      username: cluster_admin
      password: my-secret-password
    node_config:
      machine_type: n1-standard-4
      disk_size_gb: 500
      service_account: "{{ myaccount }}"
    location: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
- name: create a service account
  google.cloud.gcp_iam_service_account:
    name: sa-{{ resource_name.split("-")[-1] }}@graphite-playground.google.com.iam.gserviceaccount.com
    display_name: My Ansible test key
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
  register: myaccount