IP Aliasing Disabled

• Query id: c606ba1d-d736-43eb-ac24-e16108f3a9e0
• Query name: IP Aliasing Disabled
• Platform: Terraform
• Severity: High
• Category: Insecure Configurations
• URL: Github

Description

Kubernetes Clusters must be created with Alias IP ranges enabled, which means the attribut 'ip_allocation_policy' must be defined and, if defined, the attribute 'networking_mode' must be VPC_NATIVE
Documentation

Code samples

Code samples with security vulnerabilities

Postitive test num. 1 - tf file

#this is a problematic code where the query should report a result(s)
resource "google_container_cluster" "positive1" {
  name               = "marcellus-wallace"
  location           = "us-central1-a"
  initial_node_count = 3

  timeouts {
    create = "30m"
    update = "40m"
  }
}

resource "google_container_cluster" "positive2" {
  name               = "marcellus-wallace"
  location           = "us-central1-a"
  initial_node_count = 3

  networking_mode = "VPC_NATIVE"

  timeouts {
    create = "30m"
    update = "40m"
  }
}

resource "google_container_cluster" "positive3" {
  name               = "marcellus-wallace"
  location           = "us-central1-a"
  initial_node_count = 3
  ip_allocation_policy {

  }
  networking_mode = "ROUTES"

  timeouts {
    create = "30m"
    update = "40m"
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

#this code is a correct code for which the query should not find any result
resource "google_container_cluster" "negative1" {
  name               = "marcellus-wallace"
  location           = "us-central1-a"
  initial_node_count = 3
  ip_allocation_policy {

  }
  networking_mode = "VPC_NATIVE"

  timeouts {
    create = "30m"
    update = "40m"
  }
}