Vulnerability-Lookup

CVE-2022-23634 (GCVE-0-2022-23634)

Vulnerability from cvelistv5 – Published: 2022-02-11 21:40 – Updated: 2025-04-23 19:05

Title

Information Exposure when using Puma with Rails

Summary

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.

Severity

8 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 15:56 UTC

CWE

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

Assigner

GitHub_M mitre root

References

12 references

URL	Tags
https://github.com/puma/puma/security/advisories/…	x_refsource_CONFIRM
https://github.com/puma/puma/commit/b70f451fe8abc…	x_refsource_MISC
https://github.com/advisories/GHSA-rmj8-8hhh-gv5h	x_refsource_MISC
https://github.com/advisories/GHSA-wh98-p28r-vrc9	x_refsource_MISC
https://groups.google.com/g/ruby-security-ann/c/F…	x_refsource_MISC
https://www.debian.org/security/2022/dsa-5146	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202208-28	vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA

Impacted products

1 product

Vendor	Product	Version	CPE status
puma	puma	Affected: >= 5.0.0, < 5.6.2 Affected: < 4.3.11	guessed

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            "source": "security-advisories@github.com",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/202208-28"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5146"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://github.com/advisories/GHSA-rmj8-8hhh-gv5h"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mitigation",
              "Not Applicable",
              "Third Party Advisory"
            ],
            "url": "https://github.com/advisories/GHSA-wh98-p28r-vrc9"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Mitigation",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email\u0026utm_source=footer\u0026pli=1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/202208-28"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5146"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-200"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-404"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2025-11-21T15:51:12+00:00",
      "cve": "CVE-2022-23634",
      "id": "CVE-2022-23634",
      "initial_release_date": "2022-02-11T00:00:00+00:00",
      "product_status:fixed": "7",
      "product_status:known_affected": "6",
      "product_status:known_not_affected": "3559",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "rubygem-puma: rubygem-rails: information leak between requests",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-23634.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-26T02:15:22Z",
      "cve": "CVE-2022-23634",
      "id": "CVE-2022-23634",
      "initial_release_date": "2023-02-15T03:28:03Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "17",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-23634",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-23634.json",
      "version": "28"
    }
  }
}

OESA-2024-1007 (CVE-2022-23634)

Vulnerability from osv_openeuler – Published: 2024-01-05 11:06 – Updated: 2026-08-06 11:06 – Source website

Summary

rubygem-puma security update

Details

A simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications.

Security Fix(es):

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.(CVE-2022-23634)

Severity

5.9 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-23634	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "rubygem-puma-5.5.2-2.oe2203sp1.aarch64.rpm",
          "rubygem-puma-debugsource-5.5.2-2.oe2203sp1.aarch64.rpm",
          "rubygem-puma-debuginfo-5.5.2-2.oe2203sp1.aarch64.rpm"
        ],
        "noarch": [
          "rubygem-puma-doc-5.5.2-2.oe2203sp1.noarch.rpm"
        ],
        "src": [
          "rubygem-puma-5.5.2-2.oe2203sp1.src.rpm"
        ],
        "x86_64": [
          "rubygem-puma-debugsource-5.5.2-2.oe2203sp1.x86_64.rpm",
          "rubygem-puma-debuginfo-5.5.2-2.oe2203sp1.x86_64.rpm",
          "rubygem-puma-5.5.2-2.oe2203sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP1",
        "name": "rubygem-puma",
        "purl": "pkg:rpm/openEuler/rubygem-puma\u0026distro=openEuler-22.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.5.2-2.oe2203sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "A simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications.\r\n\r\nSecurity Fix(es):\r\n\r\nPuma 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\u0026apos; 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.(CVE-2022-23634)",
  "id": "OESA-2024-1007",
  "modified": "2026-08-06T11:06:27Z",
  "published": "2024-01-05T11:06:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2024-1007"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-23634"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rubygem-puma security update",
  "upstream": [
    "CVE-2022-23634"
  ]
}

OPENSUSE-SU-2024:11847-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

ruby3.1-rubygem-puma-5.6.2-1.1 on GA media

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2024:12900-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

ruby3.2-rubygem-puma-6.0.0-2.1 on GA media

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2024:13720-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2024-06-15 00:00

Summary

ruby3.3-rubygem-puma-6.4.2-1.1 on GA media

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2025:15123-1

Vulnerability from csaf_opensuse - Published: 2025-05-17 00:00 - Updated: 2025-05-17 00:00

Summary

ruby3.4-rubygem-puma-6.4.3-1.3 on GA media

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2026:10357-1

Vulnerability from csaf_opensuse - Published: 2026-03-13 00:00 - Updated: 2026-09-17 16:57

Summary

ruby4.0-rubygem-puma-6.4.3-1.5 on GA media

Severity

Moderate

Scope

4 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 4 products

Open the full advisory

RHSA-2022:5498

Vulnerability from csaf_redhat - Published: 2022-07-05 14:41 - Updated: 2026-09-10 00:08

Summary

Red Hat Security Advisory: Satellite 6.11 Release

Severity

Moderate

Scope

28 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

A flaw was found in Puma and Rails rubygems when response bodies were not closed under certain situations. This flaw allows an attacker, by iterating certain requests, to take advantage of this issue and affect CurrentAttributes, leading to leaked data.

8.0 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Fixed: 7 products Known not affected: 3479 products

https://access.redhat.com/errata/RHSA-2022:5498

Open the full advisory

RHSA-2022_5498

Vulnerability from csaf_redhat - Published: 2022-07-05 14:41 - Updated: 2024-11-24 21:28

Summary

Red Hat Security Advisory: Satellite 6.11 Release

Severity

Moderate

Scope

28 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

8.0 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Fixed: 7 products Known not affected: 3556 products

https://access.redhat.com/errata/RHSA-2022:5498

Open the full advisory

SUSE-SU-2022:1515-1

Vulnerability from csaf_suse - Published: 2022-05-04 08:24 - Updated: 2022-05-04 08:24

Summary

Security update for rubygem-puma

Severity

Important

Scope

3 vulnerabilities in this advisory, including CVE-2022-23634.

CVE-2022-23634

6.1 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Recommended: 32 products

Open the full advisory

UBUNTU-CVE-2022-23634 (CVE-2022-23634)

Vulnerability from osv_ubuntu – Published: 2022-02-11 22:15 – Updated: 2025-10-24 04:53 – Source website

Details

Severity

8.0 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

5.9 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2022-23634	REPORT
	https://github.com/puma/puma/security/advisories/…	REPORT
	https://github.com/puma/puma/commit/b70f451fe8abc…	REPORT
	https://groups.google.com/g/ruby-security-ann/c/F…	REPORT
	https://github.com/advisories/GHSA-rmj8-8hhh-gv5h	REPORT
	https://github.com/advisories/GHSA-wh98-p28r-vrc9	REPORT
	https://ubuntu.com/security/notices/USN-6682-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2022-23634	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "puma",
            "binary_version": "3.12.4-1ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "puma",
        "purl": "pkg:deb/ubuntu/puma@3.12.4-1ubuntu2+esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.12.4-1ubuntu2+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.12.0-2ubuntu1",
        "3.12.0-4ubuntu1",
        "3.12.4-1ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "puma",
            "binary_version": "5.5.2-2ubuntu2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "puma",
        "purl": "pkg:deb/ubuntu/puma@5.5.2-2ubuntu2+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.5.2-2ubuntu2+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.3.6-1ubuntu4",
        "5.5.2-2ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "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\u0027 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.",
  "id": "UBUNTU-CVE-2022-23634",
  "modified": "2025-10-24T04:53:29Z",
  "published": "2022-02-11T22:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-23634"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb"
    },
    {
      "type": "REPORT",
      "url": "https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email\u0026utm_source=footer\u0026pli=1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/advisories/GHSA-rmj8-8hhh-gv5h"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/advisories/GHSA-wh98-p28r-vrc9"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6682-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-23634"
    }
  ],
  "related": [
    "USN-6682-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2022-23634"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2022-23634 (GCVE-0-2022-23634)

OESA-2024-1007 (CVE-2022-23634)

UBUNTU-CVE-2022-23634 (CVE-2022-23634)

Tags

Sightings

Nomenclature

Related by attack behaviour