CloudFront distribution must use TLS 1.2 minimum

High AWS General aws-cloudfront-distribution-min-tls

Applies to

AWS::CloudFront::Distribution

What CGPulse checks

A resource passes this rule when minimumProtocolVersion must be one of ["TLSv1.2_2021","TLSv1.2_2019","TLSv1.2_2018"]. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Set minimum TLS version to 1.2 to prevent protocol downgrade attacks. In AWS Console: Resource > Settings > set Minimum TLS version to 1.2. See: https://docs.aws.amazon.com/prescriptive-guidance/latest/encryption-best-practices/welcome.html

Terraform

resource "aws_cloudfront_distribution" "{name}" {
  viewer_certificate {
    minimum_protocol_version = "TLSv1.2_2021"
  }
}

Compliance frameworks

Cloud Security: AWS Foundations
GDPR: Data Protection Controls
HIPAA: Health Information Protection164.312(e)(1)
ISO 27001: Information SecurityA.10.1.1
NIST 800-53: Cloud Security ControlsSC-8
PCI DSS v4.02.2.7

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