Google Compute Network Using Default Firewall Rule

Query id: 40abce54-95b1-478c-8e5f-ea0bf0bb0e33
Query name: Google Compute Network Using Default Firewall Rule
Platform: Terraform
Severity: Medium
Category: Networking and Firewall
CWE: 1188
URL: Github

Description¶

Google Compute Network should not use default firewall rule
Documentation

Code samples¶

Code samples with security vulnerabilities¶

Positive test num. 1 - tf file

resource "google_compute_firewall" "positive1" {
  name    = "default"
  network = google_compute_network.positive1.name
}

resource "google_compute_network" "positive1" {
  name = "test-network"
}

Code samples without security vulnerabilities¶

Negative test num. 1 - tf file

resource "google_compute_firewall" "negative1" {
  name    = "test-firewall"
  network = google_compute_network.negative1.name

  allow {
    protocol = "icmp"
  }

  allow {
    protocol = "tcp"
    ports    = ["80", "8080"]
  }

  source_tags = ["web"]
}

resource "google_compute_network" "negative1" {
  name = "test-network"
}