MSK Cluster Encryption Disabled

• Query id: 6db52fa6-d4da-4608-908a-89f0c59e743e
• Query name: MSK Cluster Encryption Disabled
• Platform: Terraform
• Severity: High
• Category: Encryption
• CWE: 311
• URL: Github

Description

Ensure MSK Cluster encryption in rest and transit is enabled
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "aws_msk_cluster" "positive1" {
  cluster_name           = "example"
  kafka_version          = "2.4.1"
  number_of_broker_nodes = 3
}

resource "aws_msk_cluster" "positive2" {
  cluster_name           = "example"
  kafka_version          = "2.4.1"
  number_of_broker_nodes = 3

  encryption_info {
    encryption_in_transit {
      client_broker = "PLAINTEXT"
    }
  }
}

resource "aws_msk_cluster" "positive3" {
  cluster_name           = "example"
  kafka_version          = "2.4.1"
  number_of_broker_nodes = 3

  encryption_info {
    encryption_in_transit {
      in_cluster = false
    }
  }
}

resource "aws_msk_cluster" "positive4" {
  cluster_name           = "example"
  kafka_version          = "2.4.1"
  number_of_broker_nodes = 3

  encryption_info {
    encryption_in_transit {
      client_broker = "PLAINTEXT"
      in_cluster = false
    }
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "aws_msk_cluster" "negative1" {  
  encryption_info {
    encryption_at_rest_kms_key_arn = aws_kms_key.kms.arn
  }
}

resource "aws_msk_cluster" "negative2" {  
  encryption_info {
    encryption_at_rest_kms_key_arn = aws_kms_key.kms.arn
    encryption_in_transit {
      client_broker = "TLS"
      in_cluster = true
    }
  }
}

resource "aws_msk_cluster" "negative3" {  
  encryption_info {
    encryption_at_rest_kms_key_arn = aws_kms_key.kms.arn
    encryption_in_transit {
      client_broker = "TLS"
    }
  }
}

resource "aws_msk_cluster" "negative4" {  
  encryption_info {
    encryption_at_rest_kms_key_arn = aws_kms_key.kms.arn
    encryption_in_transit {
      in_cluster = true
    }
  }
}