CVE-2024-45614

EIP tracks 1 public exploit for CVE-2024-45614. PoCs published by ooooooo-q.

AI-analyzed exploit summary This repository contains a functional PoC for CVE-2024-45614, demonstrating header normalization issues in Puma. The script tests various header manipulation patterns (duplicate, underscore, reverse_underscore, upper_case, reverse_upper_case) across multiple Ruby web servers (Puma, Pitchfork, Unicorn, Thin, Falcon) and versions (Rack2/Rack3).

Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-Forwarded-For) by providing a underscore version of the same header (X-Forwarded_For). Any users relying on proxy set variables is affected. v6.4.3/v5.6.9 now discards any headers using underscores if the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions.