CVE-2023-32681

Description

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.

References

https://security.gentoo.org/glsa/202309-08

https://lists.fedoraproject.org/archives/list/[email protected]/message/KOYASTZDGQG2BWLSNBPL3TQRL2G7QYNZ/

https://lists.fedoraproject.org/archives/list/[email protected]/message/AW7HNFGYP44RT3DUDQXG2QT3OEV2PJ7Y/

https://lists.debian.org/debian-lts-announce/2023/06/msg00018.html

https://github.com/psf/requests/security/advisories/GHSA-j8r2-6x86-q33q

https://github.com/psf/requests/releases/tag/v2.31.0

https://github.com/psf/requests/commit/74ea7cf7a6a27a4eeb2ae24e162bcc942a6706d5

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4