CVE-2022-23634: Puma Puma Used With Rails May Vulnerability

HIGH
Advisory Identifier: GHSA-rmj8-8hhh-gv5h
CVSS 8.0
CWE-404 CWE-200
Published
Advisory Summary

CVE-2022-23634 is a HIGH (CVSS 8.0) puma used with rails may vulnerability (CWE-404: Improper Resource Shutdown or Release) affecting Puma libraries in the RubyGems ecosystem. The issue involves puma used with rails may lead to information exposure. Remediation is available by upgrading affected packages to version 5.6.2, 4.3.11.

CVE-2022-23634 at a Glance

CVE Identifier CVE-2022-23634
GHSA Identifier GHSA-rmj8-8hhh-gv5h
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-404: Improper Resource Shutdown or Release
Affected Product Puma
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 8.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2022-23634

To remediate this vulnerability, upgrade all affected Puma dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

puma fixed: 5.6.2
Upgrade puma to 5.6.2
puma fixed: 4.3.11
Upgrade puma to 4.3.11
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

inspect dependencies for puma

How to Check if You Are Affected

To determine whether your application is affected by CVE-2022-23634, inspect your project dependencies for Puma:

inspect dependencies for puma

Analyze the terminal output to locate any version of Puma in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.6.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-404: Improper Resource Shutdown or Release, where the product does not release or incorrectly releases a resource before it is made available for re-use. In Puma, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact 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. From Rails: > Under certain circumstances response bodies will not be closed, for example a bug in a webserver[1] or a bug in a Rack middleware. In the event a response is not notified of a close, ActionDispatch::Executor will not know to reset thread local state for the next request. This can lead to data being leaked to subsequent requests, especially when interacting with ActiveSupport::CurrentAttributes. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. ### Patches 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. See: https://github.com/advisories/GHSA-wh98-p28r-vrc9 for details about the rails vulnerability Upgrading to a patched Rails _or_ Puma version fixes the vulnerability. ### Workarounds Upgrade to Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. The [Rails CVE](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) includes a middleware that can be used instead. ### References * Rails CVE: [CVE-2022-23633](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) ### For more information If you have any questions or comments about this advisory: * Open an issue in [puma](https://github.com/puma/puma) * See our [security policy](https://github.com/puma/puma/security/policy)

CVE-2022-23634 Affected Puma Versions

2 component(s)
Fixed Versions:
5.6.24.3.11
Product / Package Ecosystem Affected Versions Fixed Version
puma
RubyGems
≥ 5.0.0
< 5.6.2
5.6.2
puma
RubyGems
< 4.3.11
4.3.11

References

GitHub Advisory / Wiki ADVISORY
https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
NVD — CVE-2022-23634 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-23634
Security Fix Commit FIX COMMIT
https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-rmj8-8hhh-gv5h
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-wh98-p28r-vrc9
Puma Source Repository REPOSITORY
https://github.com/puma/puma
Puma Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2022-23634.yml
Puma Security Information SECURITY
https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB
Puma Security Information SECURITY
https://security.gentoo.org/glsa/202208-28
Puma Security Information SECURITY
https://www.debian.org/security/2022/dsa-5146

Frequently Asked Questions

What is CVE-2022-23634?
CVE-2022-23634 is a security vulnerability in Puma involving Puma used with Rails may lead to Information Exposure under CWE-404: Improper Resource Shutdown or Release.
Which Puma versions are affected?
Affected versions include releases prior to 5.6.2, 4.3.11 across affected packages: puma.
What version fixes CVE-2022-23634?
Upgrading to 5.6.2, 4.3.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is puma affected?
Yes, puma is affected in releases prior to 5.6.2, 4.3.11. Upgrade your dependency to 5.6.2, 4.3.11 or later.
What is the CVSS score of CVE-2022-23634?
CVE-2022-23634 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.
What CWE is associated with CVE-2022-23634?
CVE-2022-23634 is classified under CWE-404: Improper Resource Shutdown or Release (The product does not release or incorrectly releases a resource before it is made available for re-use.).
How can I check RubyGems dependencies for CVE-2022-23634?
Run the dependency tree command: 'inspect dependencies for puma'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rmj8-8hhh-gv5h",
  "modified" : "2022-08-16T19:43:34Z",
  "published" : "2022-02-11T21:33:23Z",
  "aliases" : [ "CVE-2022-23634" ],
  "summary" : "Puma used with Rails may lead to Information Exposure",
  "details" : "### Impact\nPrior 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.\n\nFrom Rails:\n\n> Under certain circumstances response bodies will not be closed, for example a bug in a webserver[1] or a bug in a Rack middleware. In the event a response is not notified of a close, ActionDispatch::Executor will not know to reset thread local state for the next request. This can lead to data being leaked to subsequent requests, especially when interacting with ActiveSupport::CurrentAttributes.\n\nThe combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage.\n\n### Patches\nThis problem is fixed in Puma versions 5.6.2 and 4.3.11.\n\nThis problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2.\n\nSee: \nhttps://github.com/advisories/GHSA-wh98-p28r-vrc9 \nfor details about the rails vulnerability\n\nUpgrading to a patched Rails _or_ Puma version fixes the vulnerability.\n\n### Workarounds\n\nUpgrade to Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2.\n\nThe [Rails CVE](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) includes a middleware that can be used instead.\n\n### References\n\n* Rails CVE: [CVE-2022-23633](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [puma](https://github.com/puma/puma)\n* See our [security policy](https://github.com/puma/puma/security/policy)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0"
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    } ]
  }, {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "puma"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.3.11"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
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  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-23634"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-rmj8-8hhh-gv5h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-wh98-p28r-vrc9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/puma/puma"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2022-23634.yml"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/202208-28"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2022/dsa-5146"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-404" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-02-11T21:33:23Z",
    "nvd_published_at" : "2022-02-11T22:15:00Z"
  }
}