A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the Rack::Directory app that is bundled with Rack which could result in information disclosure.
- https://usn.ubuntu.com/4561-1/
- https://github.com/Live-Hack-CVE/CVE-2020-8161
- https://github.com/amakhu/cdp