Intel

AIKIDO-2024-10293

github.com/valyala/fasthttp is vulnerable to Open Redirect

Open Redirect Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Sep 25, 2024

55

Medium Risk

This Affects:

gogithub.com/valyala/fasthttp
0.1.0 - 1.52.0
Fixed in 1.53.0
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TL;DR

Affected versions of the package are vulnerable to open redirect due to improper handling of malformed URLs. Attackers can exploit this vulnerability by sending a URL containing a comma (e.g., http://example.com,/) to the Validator, bypassing URL blocklist validation. This allows attackers to send requests to a blocklisted hostname, potentially leading to SSRF (Server-Side Request Forgery) and RCE (Remote Code Execution) attacks.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

github.com/valyala/fasthttp is vulnerable to Open Redirect in versions 0.1.0 - 1.52.0.

How to fix this

Upgrade the github.com/valyala/fasthttp library to the patch version.