AWS CloudFront Insecure Security Policy

Description:

AWS CloudFront is a content delivery network (CDN) service that provides a way to distribute content securely and with low latency. A CloudFront security policy, also known as an SSL/TLS policy, determines the SSL/TLS protocol and cipher versions that CloudFront uses when communicating with viewers. An insecure security policy can expose the traffic to vulnerabilities and potential man-in-the-middle attacks, leading to compromised data integrity and confidentiality.

Remediation:

1. Update CloudFront to Use a Secure SSL/TLS Policy:

AWS Management Console:

• Navigate to the CloudFront service.
• In the list of distributions, click the ID of the distribution you wish to update.
• Choose the Behaviors tab.
• Select the behavior you want to update, and then choose Edit.
• In the SSL/TLS Policy dropdown, select a secure policy like TLSv1.2_2018 or a more recent version, avoiding older, deprecated policies.
• Click Yes, Edit to save the changes.

Terraform:

To configure a CloudFront distribution to use a secure SSL/TLS policy, you can leverage the following Terraform snippet:

resource "aws_cloudfront_distribution" "s3_distribution" {
  # ... other configuration ...

  default_cache_behavior {
    # ... other configuration ...

    viewer_protocol_policy = "https-only"
    ssl_support_method     = "sni-only"
    minimum_protocol_version = "TLSv1.2_2018"
  }
  
  # ... other configuration ...
}

In this Terraform configuration, the minimum_protocol_version ensures that the distribution uses a secure SSL/TLS protocol version for viewer connections.

Recommendation:

Always choose the most recent and secure SSL/TLS policy for your CloudFront distributions to protect the integrity and confidentiality of your data in transit. Regularly review AWS documentation and advisories to be informed about any new SSL/TLS policy recommendations. Implement infrastructure as code (IaC) best practices to ensure your configurations are consistently applied across environments, and consider performing regular audits to detect and rectify insecure configurations.