CloudFront Without Minimum Protocol TLS 1.2

• Query id: 00e5e55e-c2ff-46b3-a757-a7a1cd802456
• Query name: CloudFront Without Minimum Protocol TLS 1.2
• Platform: Terraform
• Severity: Medium
• Category: Insecure Configurations
• URL: Github

Description

CloudFront Minimum Protocol version should be at least TLS 1.2
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "aws_cloudfront_distribution" "positive1" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    #settings
  }

  restrictions {
    #restrictions
  }
}

Positive test num. 2 - tf file

resource "aws_cloudfront_distribution" "positive2" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    #settings
  }

  restrictions {
    #restrictions
  }

  viewer_certificate {
    cloudfront_default_certificate = false
    minimum_protocol_version = "TLSv1_2016"
  }
}

Positive test num. 3 - tf file

resource "aws_cloudfront_distribution" "positive3" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    #settings
  }

  restrictions {
    #restrictions
  }

  viewer_certificate {
    cloudfront_default_certificate = true
  }
}

Positive test num. 4 - tf file

resource "aws_cloudfront_distribution" "positive4" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    #settings
  }

  restrictions {
    #restrictions
  }

  viewer_certificate {
    cloudfront_default_certificate = false
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "aws_cloudfront_distribution" "negative1" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    allowed_methods  = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
    cached_methods   = ["GET", "HEAD"]
    target_origin_id = local.s3_origin_id

    forwarded_values {
      query_string = false

      cookies {
        forward = "none"
      }
    }

    viewer_protocol_policy = "allow-all"
    min_ttl                = 0
    default_ttl            = 3600
    max_ttl                = 86400
  }

  restrictions {
    geo_restriction {
      restriction_type = "whitelist"
      locations        = ["US", "CA", "GB", "DE"]
    }
  }

  viewer_certificate {
    cloudfront_default_certificate = false
    minimum_protocol_version = "TLSv1.2_2018"
  }
}

resource "aws_cloudfront_distribution" "negative2" {
  origin {
    domain_name = aws_s3_bucket.b.bucket_regional_domain_name
    origin_id   = local.s3_origin_id

    s3_origin_config {
      origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
    }
  }

  enabled             = true
  comment             = "Some comment"
  default_root_object = "index.html"

  default_cache_behavior {
    allowed_methods  = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
    cached_methods   = ["GET", "HEAD"]
    target_origin_id = local.s3_origin_id

    forwarded_values {
      query_string = false

      cookies {
        forward = "none"
      }
    }

    viewer_protocol_policy = "allow-all"
    min_ttl                = 0
    default_ttl            = 3600
    max_ttl                = 86400
  }

  restrictions {
    geo_restriction {
      restriction_type = "whitelist"
      locations        = ["US", "CA", "GB", "DE"]
    }
  }

  viewer_certificate {
    cloudfront_default_certificate = false
    minimum_protocol_version = "TLSv1.2_2019"
  }
}