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Compute firewall allows unrestricted SSH access Affecting Compute Engine service in Google

0.0
medium
    Severity Framework Snyk CCSS
    Rule category Network / Ports

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    Frameworks
    CIS-Controls CIS-Google CSA-CCM ISO-27001 NIST-800-53 PCI-DSS SOC-2
  • Snyk ID SNYK-CC-00377
  • credit Snyk Research Team
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Description

If SSH is open to the internet, attackers can attempt to gain access to VM instances. Removing unfettered connectivity to remote console services, such as SSH, reduces a server's exposure to risk.

How to fix?

Set source_ranges attribute to specific IP range, for example 192.168.0.0/24.

Example Configuration

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

  allow {
    protocol = "tcp"
    ports    = ["22"]
  }

  source_ranges = ["192.168.0.0/24"]
}