{
  "node_id": "mitre-capec-capec-325-tcp-congestion-control-flag-ecn-probe",
  "title": "MITRE CAPEC-325: TCP Congestion Control Flag (ECN) Probe (Detailed Attack Pattern - Low Severity)",
  "domain": "Cybersecurity",
  "version": "1.0.0",
  "last_updated": "2026-05-25",
  "bluf": "MITRE CAPEC-325 (TCP Congestion Control Flag (ECN) Probe) is a detailed-level attack pattern in the MITRE Common Attack Pattern Enumeration and Classification. This OS fingerprinting probe checks to see if the remote host supports explicit congestion notification (ECN) messaging. ECN messaging was designed to allow routers to notify a remote host when signal congestion problems are occurring. Explicit Congestion Notification messaging is defined by RFC 3168. Likelihood of attack: Medium. Typical severity: Low. Maps to weaknesses CWE-200.",
  "paywall": {
    "status": "LOCKED",
    "unlock_cost_usd": "0.01",
    "skyfire_id": "41779894-ece2-4163-9761-b3b1b76e19b0"
  },
  "crosswalks": {
    "_available_keys": [
      "nist_framework",
      "iso_standard",
      "industry_mapping",
      "mitre_attack"
    ],
    "_note": "Full crosswalk values included in vault response"
  },
  "dependencies": [
    "nist-sp-800-53-r5",
    "iso-27001-2022",
    "cis-controls-v8",
    "owasp-asvs-l2"
  ],
  "primary_citations_count": 7
}