Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Requests | >= 2.3.0, < 2.31.0 |
| Fedoraproject | Fedora | 37 |
Related Weaknesses (CWE)
References
- https://github.com/psf/requests/commit/74ea7cf7a6a27a4eeb2ae24e162bcc942a6706d5Patch
- https://github.com/psf/requests/releases/tag/v2.31.0Release Notes
- https://github.com/psf/requests/security/advisories/GHSA-j8r2-6x86-q33qVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00018.html
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://security.gentoo.org/glsa/202309-08
- https://github.com/psf/requests/commit/74ea7cf7a6a27a4eeb2ae24e162bcc942a6706d5Patch
- https://github.com/psf/requests/releases/tag/v2.31.0Release Notes
- https://github.com/psf/requests/security/advisories/GHSA-j8r2-6x86-q33qVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00018.html
- https://lists.fedoraproject.org/archives/list/[email protected]Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/[email protected]
- https://security.gentoo.org/glsa/202309-08
FAQ
What is CVE-2023-32681?
CVE-2023-32681 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 `re...
How severe is CVE-2023-32681?
CVE-2023-32681 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-32681?
Check the references section above for vendor advisories and patch information. Affected products include: Python Requests, Fedoraproject Fedora.