S3 Static Website Host Enabled

  • Query id: 42bb6b7f-6d54-4428-b707-666f669d94fb
  • Query name: S3 Static Website Host Enabled
  • Platform: Terraform
  • Severity: High
  • Category: Insecure Configurations
  • CWE: 284
  • URL: Github

Description

Checks if any static websites are hosted on buckets. Even static websites can be a liability when poorly configured.
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file
provider "aws" {
  region = "us-east-1"
}

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.0"
    }
  }
}

resource "aws_s3_bucket" "positive1" {
  bucket = "s3-website-test.hashicorp.com"
  acl    = "public-read"

  website {
    index_document = "index.html"
    error_document = "error.html"
  }
}
Positive test num. 2 - tf file
module "s3_bucket" {
  source = "terraform-aws-modules/s3-bucket/aws"
  version = "3.7.0"

  bucket = "my-s3-bucket"
  acl    = "private"

  versioning = {
    enabled = true
  }

  website {
    index_document = "index.html"
    error_document = "error.html"
  }
}
Positive test num. 3 - tf file
terraform {
  required_providers {
    aws = {
      source = "hashicorp/aws"
      version = "4.2.0"
    }
  }
}

provider "aws" {
  # Configuration options
}


resource "aws_s3_bucket" "buc" {
  bucket = "my-tf-test-bucket"

  tags = {
    Name        = "My bucket"
    Environment = "Dev"
  }
}

resource "aws_s3_bucket_website_configuration" "example" {
  bucket = aws_s3_bucket.buc.bucket

  index_document {
    suffix = "index.html"
  }

  error_document {
    key = "error.html"
  }

  routing_rule {
    condition {
      key_prefix_equals = "docs/"
    }
    redirect {
      replace_key_prefix_with = "documents/"
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file
provider "aws" {
  region = "us-east-1"
}

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.0"
    }
  }
}

resource "aws_s3_bucket" "negative1" {
  bucket = "s3-website-test.hashicorp.com"
  acl    = "public-read"
}
Negative test num. 2 - tf file
module "s3_bucket" {
  source = "terraform-aws-modules/s3-bucket/aws"
  version = "3.7.0"

  bucket = "my-s3-bucket"
  acl    = "private"

  versioning = {
    enabled = true
  }
}
Negative test num. 3 - tf file
terraform {
  required_providers {
    aws = {
      source = "hashicorp/aws"
      version = "4.2.0"
    }
  }
}

provider "aws" {
  # Configuration options
}


resource "aws_s3_bucket" "bu" {
  bucket = "my-tf-test-bucket"

  tags = {
    Name        = "My bucket"
    Environment = "Dev"
  }
}