uWSGI Unauthorized Access Vulnerability

中文版本(Chinese version)

uWSGI is a web application server, which implements protocols such as WSGI/uwsgi/http, and supports for various languages through plugins. More than an application name, uwsgi is also an exchange standard between the front-end server and the back-end application container, just like Fastcgi.

uWSGI allows configuring back-end web application dynamically through Magic Variables. If the port is exposed, attackers can construct uwsgi packets and specify the magic variable UWSGI_FILE, so as to execute arbitrary commands by applying exec:// protocol.

Reference links：

• https://github.com/wofeiwo/webcgi-exploits/blob/master/python/uwsgi-rce-zh.md
• https://xz.aliyun.com/t/3512
• https://uwsgi-docs.readthedocs.io/en/latest/Vars.html

Environment Setup

Enter the following command：

docker-compose up -d

http://your-ip:8080 is a web application and its uwsgi is exposed to 8000 port.

POC

Using poc.py，you can run the command python poc.py -u your-ip:8000 -c "touch /tmp/success"：

Entering the container through docker-compose exec web bash ，you'll see /tmp/success creating successfully：

Copied From: vulhub/uwsgi/unacc