CVE-2022-23634

MEDIUM
Published Feb 11, 20224y ago · Modified Jun 17, 20262w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Feb 11, 2022 4y ago
Last Modified Jun 17, 2026 2w ago

Description

Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.

CVSS Details

Base Score
5.9
Exploitability
2.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
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 2

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure
CWE-404

Affected Products 12

VendorProductVersionRange
pumapuma* <4.3.11
pumapuma*≥5.0.0  –  <5.6.2
rubyonrailsrails*≥5.0.0  –  <5.2.6.2
rubyonrailsrails*≥6.0.0  –  <6.0.4.6
rubyonrailsrails*≥6.1.0  –  <6.1.4.6
rubyonrailsrails*≥7.0.0  –  <7.0.2.2
debiandebian_linux9.0any
debiandebian_linux10.0any
debiandebian_linux11.0any
fedoraprojectfedora35any
fedoraprojectfedora36any
fedoraprojectfedora37any

References 12

  • github.com https://github.com/advisories/GHSA-rmj8-8hhh-gv5h
    Third Party Advisory
  • github.com https://github.com/advisories/GHSA-wh98-p28r-vrc9
    MitigationNot ApplicableThird Party Advisory
  • github.com https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb
    PatchThird Party Advisory
  • github.com https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
    PatchThird Party Advisory
  • groups.google.com https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
    Mailing ListMitigationPatchThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
    Mailing ListThird 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/b70f451fe8abc0cff192c065d549778452e155bb
    PatchThird Party Advisory
  • github.com https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
    PatchThird Party Advisory
  • groups.google.com https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
    Mailing ListMitigationPatchThird Party Advisory