CloudFront distribution uses outdated SSL/TLS protocols.

Explanation

You should not use outdated/insecure TLS versions for encryption. You should be using TLS v1.2+.

Possible Impact

Outdated SSL policies increase exposure to known vulnerabilities

Suggested Resolution

Use the most modern TLS/SSL policies available

Insecure Example

The following example will fail the AVD-AWS-0013 check.

---
Resources:
  BadExample:
    Properties:
      DistributionConfig:
        DefaultCacheBehavior:
          TargetOriginId: target
          ViewerProtocolPolicy: https-only
        Enabled: true
        Logging:
          Bucket: logging-bucket
        Origins:
          - DomainName: https://some.domain
            Id: somedomain1
        ViewerCertificate:
          MinimumProtocolVersion: TLSv1.0
    Type: AWS::CloudFront::Distribution

Secure Example

The following example will pass the AVD-AWS-0013 check.

---
Resources:
  GoodExample:
    Properties:
      DistributionConfig:
        DefaultCacheBehavior:
          TargetOriginId: target
          ViewerProtocolPolicy: https-only
        Enabled: true
        Logging:
          Bucket: logging-bucket
        Origins:
          - DomainName: https://some.domain
            Id: somedomain1
        ViewerCertificate:
          MinimumProtocolVersion: TLSv1.2_2021
    Type: AWS::CloudFront::Distribution


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