CVE-2022-24790

HIGH
Published Mar 30, 20224y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 30, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-444

Affected Products 7

VendorProductVersionRange
pumapuma* <4.3.12
pumapuma*≥5.0.0  –  <5.6.4
debiandebian_linux10.0any
debiandebian_linux11.0any
fedoraprojectfedora35any
fedoraprojectfedora36any
fedoraprojectfedora37any

References 8

  • github.com https://github.com/puma/puma/commit/5bb7d202e24dec00a898dca4aa11db391d7787a5
    PatchThird Party Advisory
  • github.com https://github.com/puma/puma/security/advisories/GHSA-h99w-9q5r-gjq9
    Issue TrackingThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
    Mailing ListThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/
  • security.gentoo.org https://security.gentoo.org/glsa/202208-28
    Third Party Advisory
  • debian.org https://www.debian.org/security/2022/dsa-5146
    Third Party Advisory

Remediation

  • github.com https://github.com/puma/puma/commit/5bb7d202e24dec00a898dca4aa11db391d7787a5
    PatchThird Party Advisory