IP forwarding is enabled on the instance Affecting Compute Engine service in Google
Severity Framework
Snyk CCSS
Rule category
Network / Policy
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CIS-Google
CSA-CCM
ISO-27001
NIST-800-53
- Snyk ID SNYK-CC-00378
- credit Snyk Research Team
Description
By default, a Compute Engine instance cannot forward a packet originated by another instance ("IP forwarding"). If this is enabled, Google Cloud no longer enforces packet source and destination checking, which can result in data loss or unintended information disclosure.
How to fix?
Set the google_compute_instance can_ip_forward attribute to false.
Example Configuration
resource "google_compute_instance" "test" {
name = "enabled-ip-forwarding"
machine_type = "e2-micro"
zone = "us-east1-b"
can_ip_forward = false
boot_disk {
initialize_params {
image = "debian-10-buster-v20220920"
}
}
network_interface {
network = "default"
}
}