Severity Framework
    Snyk CCSS
    Rule category
    IAM / Secure Login

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  • Snyk ID SNYK-CC-00381
  • credit Snyk Research Team


A Compute Engine instance's serial port - also known as an interactive serial console - does not support IP-based access restrictions. If enabled, the interactive serial console can be used by clients to connect to the instance from any IP address. This enables anyone who has the correct SSH key, username, and other login information to connect to the instance.

How to fix?

Remove the metadata.serial-port-enabled attribute.

Example Configuration

resource "google_compute_instance" "allowed" {
  name         = "test"
  machine_type = "e2-medium"
  zone         = "us-central1-a"

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-11"

  network_interface {
    network = "default"