CVE-2023-32681

Name	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3456-1, ELA-870-1
Debian Bugs	1036693

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
requests (PTS)	jessie, jessie (lts)	2.4.3-6+deb8u1	fixed
	stretch (lts), stretch	2.12.4-1+deb9u1	fixed
	buster (security), buster, buster (lts)	2.21.0-1+deb10u1	fixed
	bullseye	2.25.1+dfsg-2	vulnerable
	bookworm	2.28.1+dfsg-1	vulnerable
	sid, trixie	2.32.3+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
requests	source	jessie	2.4.3-6+deb8u1	ELA-870-1
requests	source	stretch	2.12.4-1+deb9u1	ELA-870-1
requests	source	buster	2.21.0-1+deb10u1	DLA-3456-1
requests	source	(unstable)	2.31.0+dfsg-1		1036693

Notes

[bookworm] - requests <no-dsa> (Minor issue)
[bullseye] - requests <no-dsa> (Minor issue)
https://github.com/psf/requests/security/advisories/GHSA-j8r2-6x86-q33q
Fixed by: https://github.com/psf/requests/commit/74ea7cf7a6a27a4eeb2ae24e162bcc942a6706d5 (v2.31.0)