HOMEVULNERABILITIESCVE-2022-23634
MEDIUM

CVE-2022-23634

CWE-200Published: February 11, 2022· Updated: Jun 17, 2026

5.9
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2022-23634 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
puma1 product(s)
puma
rubyonrails1 product(s)
rails
Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb
PATCHhttps://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
PATCHhttps://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
PATCHhttps://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb
PATCHhttps://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
PATCHhttps://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
ADVISORYhttps://github.com/advisories/GHSA-rmj8-8hhh-gv5h
ADVISORYhttps://github.com/advisories/GHSA-wh98-p28r-vrc9
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
ADVISORYhttps://security.gentoo.org/glsa/202208-28
ADVISORYhttps://www.debian.org/security/2022/dsa-5146
ADVISORYhttps://github.com/advisories/GHSA-rmj8-8hhh-gv5h
ADVISORYhttps://github.com/advisories/GHSA-wh98-p28r-vrc9
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
ADVISORYhttps://security.gentoo.org/glsa/202208-28
ADVISORYhttps://www.debian.org/security/2022/dsa-5146

All References (24)

→
https://github.com/advisories/GHSA-rmj8-8hhh-gv5hThird Party Advisory
→
https://github.com/advisories/GHSA-wh98-p28r-vrc9Mitigation · Not Applicable · Third Party Advisory
→
https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bbPatch · Third Party Advisory
→
https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5hPatch · Third Party Advisory
→
https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1Mailing List · Mitigation · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/05/msg00034.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/08/msg00015.htmlMailing List · Third Party Advisory
→
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/202208-28Third Party Advisory
→
https://www.debian.org/security/2022/dsa-5146Third Party Advisory
→
https://github.com/advisories/GHSA-rmj8-8hhh-gv5hThird Party Advisory
→
https://github.com/advisories/GHSA-wh98-p28r-vrc9Mitigation · Not Applicable · Third Party Advisory
→
https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bbPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2022-23634
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected4 vendor(s)
PublishedFeb 11, 2022

Related CVEs (CWE-200)

CVE-2008-0082
10.0
CVE-2008-3010
10.0
CVE-2008-1252
10.0
CVE-2008-1155
10.0
CVE-2008-3914
10.0
CVE-2011-1643
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-23634 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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