CVE-2023-32681

EIP tracks 1 public exploit for CVE-2023-32681. PoCs published by hardikmodha.

AI-analyzed exploit summary This repository contains a working PoC for CVE-2023-32681, demonstrating how the Python `requests` library (<= 2.30.0) leaks `Proxy-Authorization` headers during HTTPS redirects. The PoC includes a proxy server, a redirection server, and a Python script to test the vulnerability.

Requests is a HTTP library. Since Requests 2.3.0, Requests has been leaking Proxy-Authorization headers to destination servers when redirected to an HTTPS endpoint. This is a product of how we use `rebuild_proxies` to reattach the `Proxy-Authorization` header to requests. For HTTP connections sent through the tunnel, the proxy will identify the header in the request itself and remove it prior to forwarding to the destination server. However when sent over HTTPS, the `Proxy-Authorization` header must be sent in the CONNECT request as the proxy has no visibility into the tunneled request. This results in Requests forwarding proxy credentials to the destination server unintentionally, allowing a malicious actor to potentially exfiltrate sensitive information. This issue has been patched in version 2.31.0.