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Logging metric filter and alert for network route changes should be configured Affecting Cloud Platform service in Google

Severity

0.0
medium
0
10
    Severity Framework
    Snyk CCSS
    Rule category
    Logging / Logging

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    Frameworks
    CIS-Google HIPAA ISO-27001 NIST-800-53 PCI-DSS SOC-2
  • Snyk ID SNYK-CC-00440
  • credit Snyk Research Team
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Description

Logging metric filter and alert for network route changes should be configured. Routes define the paths network traffic takes from a VM instance to another destination, which can be inside the same VPC network or outside of it. Monitoring changes to route tables helps prevent accidental or malicious changes that could result in either dropped packets or network hijacking.

How to fix?

Logging metric filter and alert for network route changes should be configured.

Example Configuration

resource "google_logging_metric" "logging_metric" {
  name   = "logging_metric"
  filter = "resource.type=\"gce_route\" AND protoPayload.methodName:\"compute.routes.delete\" OR protoPayload.methodName:\"compute.routes.insert\""

  metric_descriptor {
    value_type  = "INT64"
    metric_kind = "DELTA"
  }
}

resource "google_monitoring_alert_policy" "alert_policy" {
  depends_on   = [google_logging_metric.logging_metric]
  display_name = "Alert Policy"
  combiner     = "OR"
  conditions {
    display_name = "condition"
    condition_threshold {
      filter     = "resource.type=\"global\" metric.type=\"logging.googleapis.com/user/logging_metric\""
      duration   = "60s"
      comparison = "COMPARISON_GT"
    }
  }
}