OSLogin Is Disabled For VM Instance

• Query id: d0b4d550-c001-46c3-bbdb-d5d75d33f05f
• Query name: OSLogin Is Disabled For VM Instance
• Platform: Terraform
• Severity: Medium
• Category: Insecure Configurations
• CWE: 284
• URL: Github

Description

Check if any VM instance disables OSLogin
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "google_compute_instance" "positive1" {
  name         = "test"
  machine_type = "e2-medium"
  zone         = "us-central1-a"

  tags = ["foo", "bar"]

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-9"
    }
  }

  // Local SSD disk
  scratch_disk {
    interface = "SCSI"
  }

  network_interface {
    network = "default"

    access_config {
      // Ephemeral IP
    }
  }

  metadata = {
    #... some other metadata

    enable-oslogin = "FALSE"
  }

  metadata_startup_script = "echo hi > /test.txt"

  service_account {
    scopes = ["userinfo-email", "compute-ro", "storage-ro"]
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "google_compute_instance" "negative1" {
  name         = "test"
  machine_type = "e2-medium"
  zone         = "us-central1-a"

  tags = ["foo", "bar"]

  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-9"
    }
  }

  // Local SSD disk
  scratch_disk {
    interface = "SCSI"
  }

  network_interface {
    network = "default"

    access_config {
      // Ephemeral IP
    }
  }

  metadata = {
    #... some other metadata

    # or if not undefined
    enable-oslogin = true
  }

  metadata_startup_script = "echo hi > /test.txt"

  service_account {
    scopes = ["userinfo-email", "compute-ro", "storage-ro"]
  }
}