github - ghsa-5hq2-xf89-9jxq

GHSA-5HQ2-XF89-9JXQ

Vulnerability from github – Published: 2021-05-05 19:48 – Updated: 2023-08-08 15:56

Summary

Possible Open Redirect Vulnerability in Action Pack

Details

There is a possible Open Redirect Vulnerability in Action Pack.

Versions Affected: >= v6.1.0.rc2 Not affected: < v6.1.0.rc2 Fixed Versions: 6.1.3.2

Impact

This is similar to CVE-2021-22881. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.

Since rails/rails@9bc7ea5, strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, config.hosts << "sub.example.com" to permit a request with a Host header value of sub-example.com.

Releases

The fixed releases are available at the normal locations.

Workarounds

The following monkey patch put in an initializer can be used as a workaround.

class ActionDispatch::HostAuthorization::Permissions
  def sanitize_string(host)
    if host.start_with?(".")
      /\A(.+\.)?#{Regexp.escape(host[1..-1])}\z/i
    else
      /\A#{Regexp.escape host}\z/i
    end
  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.

6-1-open-redirect.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 Jonathan Hefner (https://hackerone.com/jonathanhefner) for reporting this bug!

Severity ?

6.1 (Medium)


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

Show details on source website

JSON

To clipboard

{
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    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionpack"
      },
      "ranges": [
        {
          "events": [
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        }
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  "aliases": [
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    "github_reviewed_at": "2021-05-05T19:47:50Z",
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  "details": "There is a possible Open Redirect Vulnerability in Action Pack.\n\nVersions Affected:  \u003e= v6.1.0.rc2\nNot affected:       \u003c v6.1.0.rc2\nFixed Versions:     6.1.3.2\n\nImpact\n------\nThis is similar to CVE-2021-22881. Specially crafted Host headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious\nwebsite.\n\nSince rails/rails@9bc7ea5, strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, config.hosts \u003c\u003c \"sub.example.com\" to permit a request with a Host header value of sub-example.com.\n\n\nReleases\n--------\nThe fixed releases are available at the normal locations.\n\nWorkarounds\n-----------\nThe following monkey patch put in an initializer can be used as a workaround.\n\n```ruby\nclass ActionDispatch::HostAuthorization::Permissions\n  def sanitize_string(host)\n    if host.start_with?(\".\")\n      /\\A(.+\\.)?#{Regexp.escape(host[1..-1])}\\z/i\n    else\n      /\\A#{Regexp.escape host}\\z/i\n    end\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* 6-1-open-redirect.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 Jonathan Hefner (https://hackerone.com/jonathanhefner) for reporting this bug!",
  "id": "GHSA-5hq2-xf89-9jxq",
  "modified": "2023-08-08T15:56:26Z",
  "published": "2021-05-05T19:48:29Z",
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22903"
    },
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      "type": "CVSS_V3"
    }
  ],
  "summary": "Possible Open Redirect Vulnerability in Action Pack"
}

CVE-2021-22903 (GCVE-0-2021-22903)

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

Summary

The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts << "sub.example.com"` to permit a request with a Host header value of `sub-example.com`.

Severity ?

No CVSS data available.

CWE

CWE-601 - Open Redirect (CWE-601)

Assigner

hackerone

References

URL

Tags

	https://hackerone.com/reports/1148025	x_refsource_MISC
	https://discuss.rubyonrails.org/t/cve-2021-22903-…	x_refsource_MISC

Impacted products

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

Show details on NVD website

JSON

To clipboard

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GSD-2021-22903

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

Details

There is a possible Open Redirect Vulnerability in Action Pack. This vulnerability has been assigned the CVE identifier CVE-2021-22903. Versions Affected: >= v6.1.0.rc2 Not affected: < v6.1.0.rc2 Fixed Versions: 6.1.3.2 Impact ------ This is similar to CVE-2021-22881: Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Since rails/rails@9bc7ea5, strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, config.hosts << "sub.example.com" to permit a request with a Host header value of sub-example.com. Workarounds ----------- The following monkey patch put in an initializer can be used as a workaround: ```ruby class ActionDispatch::HostAuthorization::Permissions def sanitize_string(host) if host.start_with?(".") /\A(.+\.)?#{Regexp.escape(host[1..-1])}\z/i else /\A#{Regexp.escape host}\z/i end end end ```

Aliases

CVE-2021-22903

JSON

To clipboard

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    "alias": "CVE-2021-22903",
    "description": "The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts \u003c\u003c \"sub.example.com\"` to permit a request with a Host header value of `sub-example.com`.",
    "id": "GSD-2021-22903",
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      "https://security.archlinux.org/CVE-2021-22903"
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          "ID": "CVE-2021-22903"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts \u003c\u003c \"sub.example.com\"` to permit a request with a Host header value of `sub-example.com`."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-601"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://hackerone.com/reports/1148025",
              "refsource": "MISC",
              "tags": [
                "Permissions Required",
                "Third Party Advisory"
              ],
              "url": "https://hackerone.com/reports/1148025"
            },
            {
              "name": "https://discuss.rubyonrails.org/t/cve-2021-22903-possible-open-redirect-vulnerability-in-action-pack/77867",
              "refsource": "MISC",
              "tags": [
                "Mitigation",
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://discuss.rubyonrails.org/t/cve-2021-22903-possible-open-redirect-vulnerability-in-action-pack/77867"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2021-10-21T14:32Z",
      "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-5HQ2-XF89-9JXQ

Impact

Releases

Workarounds

Patches

Credits

CVE-2021-22903 (GCVE-0-2021-22903)

GSD-2021-22903

Tags

Sightings

Nomenclature