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# AWS CloudFront web distribution using insecure TLS version misconfiguration detected in code

## Rule Details

|                        |                                                       |
| ---------------------- | ----------------------------------------------------- |
| Cortex AppSec Rule ID  | APPSEC\_AWS\_174                                      |
| Category - Subcategory | Public Exposure - Encryption And Protocols            |
| Provider               | AWS                                                   |
| Severity               | LOW                                                   |
| Framework              | CloudFormation, Serverless, Terraform, Terraform Plan |
| Mapped CSPM/KSPM Rule  | 3eb5afe3-259d-48d0-8437-ec58668be0d3                  |

## Impact

This rule identifies AWS CloudFront web distributions which are configured with TLS versions for HTTPS communication between viewers and CloudFront. As a best practice, use recommended TLSv1.2\_2021 as the minimum protocol version in your CloudFront distribution security policies.

## How to Fix

To fix this issue, ensure that the `MinimumProtocolVersion` property in the `ViewerCertificate` configuration of the `AWS::CloudFront::Distribution` resource is set to one of the approved TLS v1.2 versions (`TLSv1.2_2018`, `TLSv1.2_2019`, or `TLSv1.2_2021`).

## Example: \[source,go]

## Resources: MyCloudFrontDistribution: Type: AWS::CloudFront::Distribution Properties: DistributionConfig: ViewerCertificate: MinimumProtocolVersion: TLSv1.2\_2021 ... ...


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