Description
Older versions of gradio contained a vulnerability in the /file route which made them susceptible to file traversal attacks in which an attacker could access arbitrary files on a machine running a Gradio app with a public URL (e.g. if the demo was created with share=True, or on Hugging Face Spaces) if they knew the path of files to look for.
This was not possible through regular URLs passed into a browser, but it was possible through the use of programmatic tools such as curl with the --pass-as-is flag.
Furthermore, the /file route in Gradio apps also contained a vulnerability that made it possible to use it for SSRF attacks.
Explotation
The exploitation of this vulnerability is highly context/infrastructure dependent. We found out that it is possible to DoS the gradio’s server simply by running the following request:http://gradio-domain/file=http://gradio-domain
Mitigation
Both of these vulnerabilities have been fixed in gradio==4.11.0