Compute firewall allows unrestricted SSH access Affecting Compute Engine service in Google
Severity Framework
CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Snyk CCSS
Rule category
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
Network/ Ports
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CIS-ControlsCIS-GoogleCSA-CCMISO-27001NIST-800-53PCI-DSSSOC-2
- Snyk IDSNYK-CC-00377
- creditSnyk Research Team
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"]
}