CVE-2022-24790

Name	CVE-2022-24790
Description	Puma is a simple, fast, multi-threaded, parallel HTTP 1.1 server for Ruby/Rack applications. When using Puma behind a proxy that does not properly validate that the incoming HTTP request matches the RFC7230 standard, Puma and the frontend proxy may disagree on where a request starts and ends. This would allow requests to be smuggled via the front-end proxy to Puma. The vulnerability has been fixed in 5.6.4 and 4.3.12. Users are advised to upgrade as soon as possible. Workaround: when deploying a proxy in front of Puma, turning on any and all functionality to make sure that the request matches the RFC7230 standard.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-3083-1, DSA-5146-1
Debian Bugs	1008723

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
puma (PTS)	buster	3.12.0-2+deb10u2	vulnerable
	buster (security)	3.12.0-2+deb10u3	fixed
	bullseye	4.3.8-1	vulnerable
	bullseye (security)	4.3.8-1+deb11u2	fixed
	bookworm, sid	5.6.5-3	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
puma	source	buster	3.12.0-2+deb10u3	DLA-3083-1
puma	source	bullseye	4.3.8-1+deb11u2	DSA-5146-1
puma	source	(unstable)	5.6.4-1		1008723

Notes

[stretch] - puma <no-dsa> (possibly introduces regressions)
https://github.com/puma/puma/security/advisories/GHSA-h99w-9q5r-gjq9
https://github.com/puma/puma/commit/5bb7d202e24dec00a898dca4aa11db391d7787a5 (5-6-stable)
https://github.com/puma/puma/commit/6c514e70f5ae0ff14c9b0091fa84bfa39b022025 (v5.6.3)