Neptune cluster with IAM database authentication disabled

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Metadata

Id: c91d7ea0-d4d1-403b-8fe1-c9961ac082c5

Cloud Provider: AWS

Platform: Terraform

Severity: High

Category: Access Control

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Description

AWS Neptune clusters should have IAM database authentication enabled to enhance security by using IAM users and roles instead of standard username and password credentials. When disabled, an attacker who gains access to the database credentials could directly connect to the database without additional IAM verification. To secure your Neptune cluster, add the iam_database_authentication_enabled = true parameter, as shown in the following example:

resource "aws_neptune_cluster" "example" {
  cluster_identifier = "neptune-cluster-demo"
  // other configuration...
  iam_database_authentication_enabled = true
}

Compliant Code Examples

resource "aws_neptune_cluster" "negative1" {
  cluster_identifier                  = "neptune-cluster-demo"
  engine                              = "neptune"
  backup_retention_period             = 5
  preferred_backup_window             = "07:00-09:00"
  skip_final_snapshot                 = true
  iam_database_authentication_enabled = true
  apply_immediately                   = true
  storage_encrypted                   = true
}

Non-Compliant Code Examples

resource "aws_neptune_cluster" "positive1" {
  cluster_identifier                  = "neptune-cluster-demo"
  engine                              = "neptune"
  backup_retention_period             = 5
  preferred_backup_window             = "07:00-09:00"
  skip_final_snapshot                 = true
  apply_immediately                   = true
  storage_encrypted                   = true
}

resource "aws_neptune_cluster" "positive2" {
  cluster_identifier                  = "neptune-cluster-demo"
  engine                              = "neptune"
  backup_retention_period             = 5
  preferred_backup_window             = "07:00-09:00"
  skip_final_snapshot                 = true
  iam_database_authentication_enabled = false
  apply_immediately                   = true
  storage_encrypted                   = true
}