Secure ciphers disabled

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Metadata

Id: ansible-aws-secure-ciphers-disabled

Provider: AWS

Platform: Ansible

Severity: Medium

Category: Encryption

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Description

CloudFront distributions that do not enforce a modern minimum TLS protocol version can allow legacy TLS/SSL versions, increasing the risk of downgrade attacks and interception of data in transit.

For Ansible CloudFront resources (modules community.aws.cloudfront_distribution and cloudfront_distribution), the viewer_certificate.minimum_protocol_version property must be defined and set to TLSv1.1 or TLSv1.2 (preferably TLSv1.2) when using a custom certificate (viewer_certificate.cloudfront_default_certificate set to false). Resources that omit minimum_protocol_version or specify any other value are flagged.

Secure configuration example for Ansible:

- name: Create CloudFront distribution with secure TLS
  community.aws.cloudfront_distribution:
    name: my-distribution
    viewer_certificate:
      cloudfront_default_certificate: false
      acm_certificate_arn: arn:aws:acm:region:acct:certificate/your-cert-id
      minimum_protocol_version: TLSv1.2

Compliant Code Examples

- name: example
  community.aws.cloudfront_distribution:
    state: present
    caller_reference: unique test distribution ID
    origins:
    - id: my test origin-000111
      domain_name: www.example.com
      origin_path: /production
      custom_headers:
      - header_name: MyCustomHeaderName
        header_value: MyCustomHeaderValue
    viewer_certificate:
      cloudfront_default_certificate: true

Non-Compliant Code Examples

- name: example
  community.aws.cloudfront_distribution:
    state: present
    caller_reference: unique test distribution ID
    origins:
      - id: 'my test origin-000111'
        domain_name: www.example.com
        origin_path: /production
        custom_headers:
          - header_name: MyCustomHeaderName
            header_value: MyCustomHeaderValue
    viewer_certificate:
      cloudfront_default_certificate: false
      minimum_protocol_version: 'SSLv3'