CA certificate identifier is outdated

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Metadata

Id: 5eccd62d-8b4d-46d3-83ea-1879f3cbd3ce

Cloud Provider: AWS

Platform: Ansible

Severity: Medium

Category: Encryption

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Description

RDS instances must specify a CA certificate identifier so the database uses a known AWS CA for TLS connections and avoids broken or insecure certificate chains during CA rotations. For Ansible RDS resources (modules amazon.aws.rds_instance and rds_instance), the ca_certificate_identifier property must be defined and set to rds-ca-2019. Resources missing this property or specifying a different value are flagged. Update the value if AWS publishes a newer CA identifier.

Secure Ansible task example:

- name: create RDS instance with CA
  amazon.aws.rds_instance:
    db_instance_identifier: my-db
    engine: mysql
    instance_class: db.t3.medium
    allocated_storage: 20
    username: admin
    password: secret
    ca_certificate_identifier: rds-ca-2019

Compliant Code Examples

- name: create minimal aurora instance in default VPC and default subnet group
  amazon.aws.rds_instance:
    engine: aurora
    db_instance_identifier: ansible-test-aurora-db-instance
    instance_type: db.t2.small
    password: '{{ password }}'
    username: '{{ username }}'
    cluster_id: ansible-test-cluster
    ca_certificate_identifier: rds-ca-2019
- name: Create a DB instance using the default AWS KMS encryption key
  amazon.aws.rds_instance:
    id: test-encrypted-db
    state: present
    engine: mariadb
    storage_encrypted: true
    db_instance_class: db.t2.medium
    username: '{{ username }}'
    password: '{{ password }}'
    allocated_storage: '{{ allocated_storage }}'
    ca_certificate_identifier: rds-ca-2019

Non-Compliant Code Examples

---
- name: create minimal aurora instance in default VPC and default subnet group
  amazon.aws.rds_instance:
    engine: aurora
    db_instance_identifier: ansible-test-aurora-db-instance
    instance_type: db.t2.small
    password: "{{ password }}"
    username: "{{ username }}"
    cluster_id: ansible-test-cluster
    ca_certificate_identifier: rds-ca-2015
- name: create a DB instance using the default AWS KMS encryption key
  amazon.aws.rds_instance:
    id: test-encrypted-db
    state: present
    engine: mariadb
    storage_encrypted: True
    db_instance_class: db.t2.medium
    username: "{{ username }}"
    password: "{{ password }}"
    allocated_storage: "{{ allocated_storage }}"