Redshift cluster without VPC

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Metadata

Id: 0a494a6a-ebe2-48a0-9d77-cf9d5125e1b3

Cloud Provider: aws

Framework: Terraform

Severity: Low

Category: Insecure Configurations

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Description

Amazon Redshift clusters should be deployed within an Amazon VPC to ensure network isolation and control over access to the cluster. If the vpc_security_group_ids and cluster_subnet_group_name attributes are not specified, the cluster is created outside a VPC and could be exposed to the public internet, increasing the risk of unauthorized access and data breaches. A secure configuration includes the following attributes:

resource "aws_redshift_cluster" "secure_example" {
  // other attributes
  vpc_security_group_ids     = [aws_security_group.redshift.id]
  cluster_subnet_group_name  = aws_redshift_subnet_group.redshift_subnet_group.id
}

Compliant Code Examples

resource "aws_redshift_cluster" "negative1" {
  cluster_identifier = "tf-redshift-cluster"
  database_name      = "mydb"
  master_username    = "foo"
  master_password    = "Mustbe8characters"
  node_type          = "dc1.large"
  cluster_type       = "single-node"
  logging {
      enable = true
      bucket_name = "nameOfAnExistingS3Bucket"
  }
  vpc_security_group_ids = [
    aws_security_group.redshift.id
  ]
  cluster_subnet_group_name = aws_redshift_subnet_group.redshift_subnet_group.id
}

Non-Compliant Code Examples

resource "aws_redshift_cluster" "positive1" {
  cluster_identifier = "tf-redshift-cluster"
  database_name      = "mydb"
  master_username    = "foo"
  master_password    = "Mustbe8characters"
  node_type          = "dc1.large"
  cluster_type       = "single-node"
  logging {
      enable = true
      bucket_name = "nameOfAnExistingS3Bucket"
  }
}