CVE-2022-24790

30.03.2022, 22:15

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.

HTTP Request/Response Smuggling

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	9.1 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub_M	CNA	9.1 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 60%

Vendor	Product	Version
puma	puma	𝑥 < 4.3.12
puma	puma	5.0.0 ≤ 𝑥 < 5.6.4
debian	debian_linux	10.0
debian	debian_linux	11.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

puma

bullseye (security)	4.3.8-1+deb11u2 fixed
bullseye	4.3.8-1+deb11u2 fixed
stretch	no-dsa
bookworm	5.6.5-3 fixed
sid	6.4.2-6 fixed
trixie	6.4.2-6 fixed

Ubuntu Releases

Ubuntu Product

Codename

puma

noble	not-affected
mantic	not-affected
lunar	not-affected
kinetic	ignored
jammy	Fixed 5.5.2-2ubuntu2+esm1 released
impish	ignored
focal	Fixed 3.12.4-1ubuntu2+esm1 released
xenial	ignored
trusty	ignored

Common Weakness Enumeration

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

References

https://github.com/puma/puma/commit/5bb7d202e24dec00a898dca4aa11db391d7787a5

https://github.com/puma/puma/security/advisories/GHSA-h99w-9q5r-gjq9

https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/

https://security.gentoo.org/glsa/202208-28

https://www.debian.org/security/2022/dsa-5146