CVE-2024-2206: gradio SSRF — Exploit & Fix

Description

An SSRF vulnerability exists in the gradio-app/gradio due to insufficient validation of user-supplied URLs in the `/proxy` route. Attackers can exploit this vulnerability by manipulating the `self.replica_urls` set through the `X-Direct-Url` header in requests to the `/` and `/config` routes, allowing the addition of arbitrary URLs for proxying. This flaw enables unauthorized proxying of requests and potential access to internal endpoints within the Hugging Face space. The issue arises from the application's inadequate checking of safe URLs in the `build_proxy_request` function.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
gradio_project	gradio	3.47.1 — 4.18.0

References

Advisories & Patches

https://github.com/gradio-app/gradio/commit/49d9c48537aa706bf72628e3640389470138bdc6 https://github.com/gradio-app/gradio/commit/49d9c48537aa706bf72628e3640389470138bdc6

Exploits

https://huntr.com/bounties/2286c1ed-b889-45d6-adda-7014ea06d98e https://huntr.com/bounties/2286c1ed-b889-45d6-adda-7014ea06d98e

Frequently Asked Questions

What is CVE-2024-2206? +

An SSRF vulnerability exists in the gradio-app/gradio due to insufficient validation of user-supplied URLs in the `/proxy` route. Attackers can exploit this vulnerability by manipulating the `self.replica_urls` set through the `X-Direct-Url` header in requests to the `/` and `/config` routes, allowing the addition of arbitrary URLs for proxying. This flaw enables unauthorized proxying of requests and potential access to internal endpoints within the Hugging Face space. The issue arises from the application's inadequate checking of safe URLs in the `build_proxy_request` function. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-2206? +

CVE-2024-2206 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-2206? +

CVE-2024-2206 affects products from gradio_project, specifically: gradio. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-2206? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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