github - GHSA-g8ww-46x2-2p65

GHSA-G8WW-46X2-2P65

Vulnerability from github – Published: 2021-05-05 19:48 – Updated: 2023-08-08 15:37

Summary

Denial of Service in Action Dispatch

Details

Impact

There is a possible Denial of Service vulnerability in Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.

Releases

The fixed releases are available at the normal locations.

Workarounds

The following monkey patch placed in an initializer can be used to work around the issue.

module Mime
  class Type
    MIME_REGEXP = /\A(?:\*\/\*|#{MIME_NAME}\/(?:\*|#{MIME_NAME})(?>\s*#{MIME_PARAMETER}\s*)*)\z/
  end
end

Patches

To aid users who aren't able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.

6-0-Prevent-catastrophic-backtracking-during-mime-parsin.patch - Patch for 6.0 series
6-1-Prevent-catastrophic-backtracking-during-mime-parsin.patch - Patch for 6.1 series

Please note that only the 6.1.Z, 6.0.Z, and 5.2.Z series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases.

Credits

Thanks to Security Curious security...@pm.me for reporting this!

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

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  "aliases": [
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  "database_specific": {
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    "github_reviewed": true,
    "github_reviewed_at": "2021-05-05T19:47:37Z",
    "nvd_published_at": "2021-06-11T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "Impact\n------\nThere is a possible Denial of Service vulnerability in Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.\n\nReleases\n--------\nThe fixed releases are available at the normal locations.\n\nWorkarounds\n-----------\nThe following monkey patch placed in an initializer can be used to work around the issue.\n\n```ruby\nmodule Mime\n  class Type\n    MIME_REGEXP = /\\A(?:\\*\\/\\*|#{MIME_NAME}\\/(?:\\*|#{MIME_NAME})(?\u003e\\s*#{MIME_PARAMETER}\\s*)*)\\z/\n  end\nend\n```\n\nPatches\n-------\nTo aid users who aren\u0027t able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.\n\n* 6-0-Prevent-catastrophic-backtracking-during-mime-parsin.patch - Patch for 6.0 series\n* 6-1-Prevent-catastrophic-backtracking-during-mime-parsin.patch - Patch for 6.1 series\n\nPlease note that only the 6.1.Z, 6.0.Z, and 5.2.Z series are supported at present. Users of earlier unsupported releases are advised to upgrade as soon as possible as we cannot guarantee the continued availability of security fixes for unsupported releases.\n\nCredits\n-------\n\nThanks to Security Curious \u003csecurity...@pm.me\u003e for reporting this!",
  "id": "GHSA-g8ww-46x2-2p65",
  "modified": "2023-08-08T15:37:20Z",
  "published": "2021-05-05T19:48:21Z",
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    }
  ],
  "summary": "Denial of Service in Action Dispatch"
}

CVE-2021-22902 (GCVE-0-2021-22902)

Vulnerability from cvelistv5 – Published: 2021-06-11 15:49 – Updated: 2024-08-03 18:58

Summary

The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.

Severity ?

No CVSS data available.

CWE

CWE-400 - Denial of Service (CWE-400)

Assigner

hackerone

References

URL

Tags

	https://hackerone.com/reports/1138654	x_refsource_MISC
	https://discuss.rubyonrails.org/t/cve-2021-22902-…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	n/a	https://github.com/rails/rails	Affected: Fixed in 6.0.3.7, 6.1.3.2

Show details on NVD website

JSON

To clipboard

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GSD-2021-22902

Vulnerability from gsd - Updated: 2021-05-05 00:00

Details

There is a possible Denial of Service vulnerability in the Mime type parser of Action Dispatch. This vulnerability has been assigned the CVE identifier CVE-2021-22902. Versions Affected: >= 6.0.0 Not affected: < 6.0.0 Fixed Versions: 6.0.3.7, 6.1.3.2 Impact ------ There is a possible Denial of Service vulnerability in Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine. Workarounds ----------- The following monkey patch placed in an initializer can be used to work around the issue: ```ruby module Mime class Type MIME_REGEXP = /\A(?:\*\/\*|#{MIME_NAME}\/(?:\*|#{MIME_NAME})(?>\s*#{MIME_PARAMETER}\s*)*)\z/ end end ```

Aliases

CVE-2021-22902

JSON

To clipboard

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    "description": "The actionpack ruby gem (a framework for handling and responding to web requests in Rails) before 6.0.3.7, 6.1.3.2 suffers from a possible denial of service vulnerability in the Mime type parser of Action Dispatch. Carefully crafted Accept headers can cause the mime type parser in Action Dispatch to do catastrophic backtracking in the regular expression engine.",
    "id": "GSD-2021-22902",
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          "reference_data": [
            {
              "name": "https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Mitigation",
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://discuss.rubyonrails.org/t/cve-2021-22902-possible-denial-of-service-vulnerability-in-action-dispatch/77866"
            },
            {
              "name": "https://hackerone.com/reports/1138654",
              "refsource": "MISC",
              "tags": [
                "Permissions Required",
                "Third Party Advisory"
              ],
              "url": "https://hackerone.com/reports/1138654"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-08-18T19:13Z",
      "publishedDate": "2021-06-11T16:15Z"
    }
  }
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-G8WW-46X2-2P65

Impact

Releases

Workarounds

Patches

Credits

CVE-2021-22902 (GCVE-0-2021-22902)

GSD-2021-22902

Tags

Sightings

Nomenclature