CloudFront Insecure Origin SSL Protocols

ID: cloudfront-insecure-protocol

Severity: medium

Author: DhiyaneshDK

Tags: cloud,devops,aws,amazon,cloudfront,aws-cloud-config

Description

Ensure that your Amazon CloudFront Content Delivery Network (CDN) distributions are not using insecure SSL protocols (i.e. SSLv3) for HTTPS communication between CloudFront edge locations and custom origins.

YAML Source

id: cloudfront-insecure-protocol

info:
  name: CloudFront Insecure Origin SSL Protocols
  author: DhiyaneshDK
  severity: medium
  description: |
    Ensure that your Amazon CloudFront Content Delivery Network (CDN) distributions are not using insecure SSL protocols (i.e. SSLv3) for HTTPS communication between CloudFront edge locations and custom origins.
  impact: |
    Insecure SSL protocols for CloudFront origins can expose sensitive data to interception and compromise, increasing the risk of man-in-the-middle attacks.
  remediation: |
    Configure your CloudFront distribution to enforce the use of secure SSL/TLS protocols (TLS 1.2 or higher) for all origins and disable support for outdated protocols like SSLv3 and TLS 1.0/1.1.
  reference:
    - https://www.trendmicro.com/cloudoneconformity-staging/knowledge-base/aws/CloudFront/cloudfront-insecure-origin-ssl-protocols.html
    - http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/SecureConnections.html
  tags: cloud,devops,aws,amazon,cloudfront,aws-cloud-config

variables:
  region: "us-west-2"

flow: |
  code(1)
  for(let DistributionListItemsId of iterate(template.distributions)){
    set("distribution", DistributionListItemsId)
    code(2)
  }

self-contained: true

code:
  - engine:
      - sh
      - bash

    source: |
      aws cloudfront list-distributions --output table --query 'DistributionList.Items[*].Id' --region $region --output json

    extractors:
      - type: json
        name: distributions
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash

    source: |
        aws cloudfront get-distribution --id $distribution --query 'Distribution.DistributionConfig.Origins.Items[*].CustomOriginConfig.OriginSslProtocols.Items | []' --region $region --output json

    matchers:
      - type: word
        words:
          - "SSLv3"

    extractors:
      - type: dsl
        dsl:
          - '"CloudFront Uses SSLv3 Protocol in" + distribution'
# digest: 490a0046304402203f82a403b2d5299d4e40fe21ec8d29df8dca63b594e26c055fb1aea9e3b183e9022070d55cd893d231f70803f0755dfbf169c2917ea01d600a785c3b5e5e4277a9ae:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "cloud/aws/cloudfront/cloudfront-insecure-protocol.yaml"

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