gsd-2021-22942

Vulnerability from gsd

Modified

2021-08-19 00:00

Details

There is a possible open redirect vulnerability in the Host Authorization middleware in Action Pack. This vulnerability has been assigned the CVE identifier CVE-2021-22942. Versions Affected: >= 6.0.0. Not affected: < 6.0.0 Fixed Versions: 6.1.4.1, 6.0.4.1 Impact ------ Specially crafted “X-Forwarded-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. Impacted applications will have allowed hosts with a leading dot. For example, configuration files that look like this: ```ruby config.hosts << '.EXAMPLE.com' ``` When an allowed host contains a leading dot, a specially crafted Host header can be used to redirect to a malicious website. This vulnerability is similar to CVE-2021-22881, but CVE-2021-22881 did not take in to account domain name case sensitivity. Releases -------- The fixed releases are available at the normal locations. Workarounds ----------- In the case a patch can’t be applied, the following monkey patch can be used in an initializer: ```ruby module ActionDispatch class HostAuthorization HOSTNAME = /[a-z0-9.-]+|\[[a-f0-9]*:[a-f0-9.:]+\]/i VALID_ORIGIN_HOST = /\A(#{HOSTNAME})(?::\d+)?\z/ VALID_FORWARDED_HOST = /(?:\A|,[]?)(#{HOSTNAME})(?::\d+)?\z/ private def authorized?(request) origin_host = request.get_header("HTTP_HOST")&.slice(VALID_ORIGIN_HOST, 1) || "" forwarded_host = request.x_forwarded_host&.slice(VALID_FORWARDED_HOST, 1) || "" @permissions.allows?(origin_host) && (forwarded_host.blank? || @permissions.allows?(forwarded_host)) end end end ```

Aliases

CVE-2021-22942

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-22942",
    "description": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack \u003e= 6.0.0 that could allow attackers to redirect users to a malicious website.",
    "id": "GSD-2021-22942",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-22942.html",
      "https://security.archlinux.org/CVE-2021-22942",
      "https://www.debian.org/security/2023/dsa-5372"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "actionpack",
            "purl": "pkg:gem/actionpack"
          }
        }
      ],
      "aliases": [
        "CVE-2021-22942",
        "GHSA-2rqw-v265-jf8c"
      ],
      "details": "There is a possible open redirect vulnerability in the Host Authorization\nmiddleware in Action Pack. This vulnerability has been assigned the CVE\nidentifier CVE-2021-22942.\n\nVersions Affected: \u003e= 6.0.0.\nNot affected: \u003c 6.0.0\nFixed Versions: 6.1.4.1, 6.0.4.1\n\nImpact\n------\n\nSpecially crafted \u201cX-Forwarded-Host\u201d headers in combination with certain\n\u201callowed host\u201d formats can cause the Host Authorization middleware in\nAction Pack to redirect users to a malicious website.\n\nImpacted applications will have allowed hosts with a leading dot.\nFor example, configuration files that look like this:\n\n```ruby\nconfig.hosts \u003c\u003c  \u0027.EXAMPLE.com\u0027\n```\n\nWhen an allowed host contains a leading dot, a specially crafted\nHost header can be used to redirect to a malicious website.\n\nThis vulnerability is similar to CVE-2021-22881, but CVE-2021-22881 did not\ntake in to account domain name case sensitivity.\n\nReleases\n--------\n\nThe fixed releases are available at the normal locations.\n\nWorkarounds\n-----------\n\nIn the case a patch can\u2019t be applied, the following monkey patch can be\nused in an initializer:\n\n```ruby\nmodule ActionDispatch\n  class HostAuthorization\n    HOSTNAME = /[a-z0-9.-]+|\\[[a-f0-9]*:[a-f0-9.:]+\\]/i\n    VALID_ORIGIN_HOST = /\\A(#{HOSTNAME})(?::\\d+)?\\z/\n    VALID_FORWARDED_HOST = /(?:\\A|,[]?)(#{HOSTNAME})(?::\\d+)?\\z/\n\n    private\n      def authorized?(request)\n        origin_host =\n          request.get_header(\"HTTP_HOST\")\u0026.slice(VALID_ORIGIN_HOST, 1) || \"\"\n        forwarded_host =\n          request.x_forwarded_host\u0026.slice(VALID_FORWARDED_HOST, 1) || \"\"\n        @permissions.allows?(origin_host) \u0026\u0026\n          (forwarded_host.blank? || @permissions.allows?(forwarded_host))\n      end\n  end\nend\n```\n",
      "id": "GSD-2021-22942",
      "modified": "2021-08-19T00:00:00.000Z",
      "published": "2021-08-19T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c"
        }
      ],
      "related": [
        "CVE-2021-22881"
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 7.6,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Possible Open Redirect in Host Authorization Middleware"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "support@hackerone.com",
        "ID": "CVE-2021-22942",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "https://github.com/rails/rails",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "6.1.4.1, 6.0.4.1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack \u003e= 6.0.0 that could allow attackers to redirect users to a malicious website."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Open Redirect (CWE-601)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/",
            "refsource": "MISC",
            "url": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/"
          },
          {
            "name": "[oss-security] 20211214 [CVE-2021-44528] Possible Open Redirect in Host Authorization Middleware",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2021/12/14/5"
          },
          {
            "name": "DSA-5372",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2023/dsa-5372"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20240202-0005/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20240202-0005/"
          }
        ]
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2021-22942",
      "cvss_v3": 7.6,
      "date": "2021-08-19",
      "description": "There is a possible open redirect vulnerability in the Host Authorization\nmiddleware in Action Pack. This vulnerability has been assigned the CVE\nidentifier CVE-2021-22942.\n\nVersions Affected: \u003e= 6.0.0.\nNot affected: \u003c 6.0.0\nFixed Versions: 6.1.4.1, 6.0.4.1\n\nImpact\n------\n\nSpecially crafted \u201cX-Forwarded-Host\u201d headers in combination with certain\n\u201callowed host\u201d formats can cause the Host Authorization middleware in\nAction Pack to redirect users to a malicious website.\n\nImpacted applications will have allowed hosts with a leading dot.\nFor example, configuration files that look like this:\n\n```ruby\nconfig.hosts \u003c\u003c  \u0027.EXAMPLE.com\u0027\n```\n\nWhen an allowed host contains a leading dot, a specially crafted\nHost header can be used to redirect to a malicious website.\n\nThis vulnerability is similar to CVE-2021-22881, but CVE-2021-22881 did not\ntake in to account domain name case sensitivity.\n\nReleases\n--------\n\nThe fixed releases are available at the normal locations.\n\nWorkarounds\n-----------\n\nIn the case a patch can\u2019t be applied, the following monkey patch can be\nused in an initializer:\n\n```ruby\nmodule ActionDispatch\n  class HostAuthorization\n    HOSTNAME = /[a-z0-9.-]+|\\[[a-f0-9]*:[a-f0-9.:]+\\]/i\n    VALID_ORIGIN_HOST = /\\A(#{HOSTNAME})(?::\\d+)?\\z/\n    VALID_FORWARDED_HOST = /(?:\\A|,[]?)(#{HOSTNAME})(?::\\d+)?\\z/\n\n    private\n      def authorized?(request)\n        origin_host =\n          request.get_header(\"HTTP_HOST\")\u0026.slice(VALID_ORIGIN_HOST, 1) || \"\"\n        forwarded_host =\n          request.x_forwarded_host\u0026.slice(VALID_FORWARDED_HOST, 1) || \"\"\n        @permissions.allows?(origin_host) \u0026\u0026\n          (forwarded_host.blank? || @permissions.allows?(forwarded_host))\n      end\n  end\nend\n```\n",
      "framework": "rails",
      "gem": "actionpack",
      "ghsa": "2rqw-v265-jf8c",
      "patched_versions": [
        "~\u003e 6.0.4, \u003e= 6.0.4.1",
        "\u003e= 6.1.4.1"
      ],
      "related": {
        "cve": [
          "2021-22881"
        ]
      },
      "title": "Possible Open Redirect in Host Authorization Middleware",
      "unaffected_versions": [
        "\u003c 6.0.0"
      ],
      "url": "https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=6.0.0 \u003c=6.0.4||\u003e=6.1.0 \u003c=6.1.4",
          "affected_versions": "All versions starting from 6.0.0 up to 6.0.4, all versions starting from 6.1.0 up to 6.1.4",
          "cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-601",
            "CWE-937"
          ],
          "date": "2021-12-15",
          "description": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack \u003e= 6.0.0 that could allow attackers to redirect users to a malicious website.",
          "fixed_versions": [
            "6.0.4.1",
            "6.1.4.1"
          ],
          "identifier": "CVE-2021-22942",
          "identifiers": [
            "GHSA-2rqw-v265-jf8c",
            "CVE-2021-22942"
          ],
          "not_impacted": "All versions before 6.0.0, all versions after 6.0.4 before 6.1.0, all versions after 6.1.4",
          "package_slug": "gem/actionpack",
          "pubdate": "2021-08-26",
          "solution": "Upgrade to versions 6.0.4.1, 6.1.4.1 or above.",
          "title": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-22942",
            "https://access.redhat.com/security/cve/cve-2021-22942",
            "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml",
            "https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c",
            "https://rubygems.org/gems/actionpack",
            "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/",
            "http://www.openwall.com/lists/oss-security/2021/12/14/5",
            "https://github.com/advisories/GHSA-2rqw-v265-jf8c"
          ],
          "uuid": "38e3f4f9-ca8c-4d72-974a-d8e9904bb847"
        },
        {
          "affected_range": "\u003e=6.0.0 \u003c6.0.4.1||\u003e=6.1.0 \u003c6.1.4.1",
          "affected_versions": "All versions starting from 6.0.0 before 6.0.4.1, all versions starting from 6.1.0 before 6.1.4.1",
          "cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-601",
            "CWE-937"
          ],
          "date": "2023-03-14",
          "description": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack that could allow attackers to redirect users to a malicious website.",
          "fixed_versions": [
            "6.0.4.1",
            "6.1.4.1"
          ],
          "identifier": "CVE-2021-22942",
          "identifiers": [
            "CVE-2021-22942"
          ],
          "not_impacted": "All versions before 6.0.0, all versions starting from 6.0.4.1 before 6.1.0, all versions starting from 6.1.4.1",
          "package_slug": "gem/rails",
          "pubdate": "2021-10-18",
          "solution": "Upgrade to versions 6.0.4.1, 6.1.4.1 or above.",
          "title": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-22942",
            "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/"
          ],
          "uuid": "e453405c-629c-4052-99c3-d335c8790563"
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8AB5441B-36FB-4F96-B958-E36F4A15E510",
                    "versionEndExcluding": "6.0.4.1",
                    "versionStartIncluding": "6.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9D495715-8C1F-4734-AA73-A6F82E181AF2",
                    "versionEndExcluding": "6.1.4.1",
                    "versionStartIncluding": "6.1.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack \u003e= 6.0.0 that could allow attackers to redirect users to a malicious website."
          },
          {
            "lang": "es",
            "value": "Se presenta una posible vulnerabilidad de redireccionamiento abierto en el middleware Host Authorization de Action Pack versiones posteriores a 6.0.0 incluy\u00e9ndola, que podr\u00eda permitir a atacantes redirigir a usuarios a un sitio web malicioso"
          }
        ],
        "id": "CVE-2021-22942",
        "lastModified": "2024-02-02T14:15:53.073",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "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,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "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,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-10-18T13:15:09.323",
        "references": [
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/12/14/5"
          },
          {
            "source": "support@hackerone.com",
            "url": "https://security.netapp.com/advisory/ntap-20240202-0005/"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/"
          },
          {
            "source": "support@hackerone.com",
            "url": "https://www.debian.org/security/2023/dsa-5372"
          }
        ],
        "sourceIdentifier": "support@hackerone.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-601"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-601"
              }
            ],
            "source": "support@hackerone.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}

cve-2021-22942

Vulnerability from cvelistv5

Published

2021-10-18 00:00

Modified

2024-08-03 18:58

Severity ?

Summary

A possible open redirect vulnerability in the Host Authorization middleware in Action Pack >= 6.0.0 that could allow attackers to redirect users to a malicious website.

References

▼	URL	Tags
	https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/
	http://www.openwall.com/lists/oss-security/2021/12/14/5	mailing-list
	https://www.debian.org/security/2023/dsa-5372	vendor-advisory
	https://security.netapp.com/advisory/ntap-20240202-0005/

Impacted products

	Vendor	Product	Version
	n/a	https://github.com/rails/rails	Version: 6.1.4.1, 6.0.4.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T18:58:26.009Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/"
          },
          {
            "name": "[oss-security] 20211214 [CVE-2021-44528] Possible Open Redirect in Host Authorization Middleware",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/12/14/5"
          },
          {
            "name": "DSA-5372",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5372"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240202-0005/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "https://github.com/rails/rails",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "6.1.4.1, 6.0.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A possible open redirect vulnerability in the Host Authorization middleware in Action Pack \u003e= 6.0.0 that could allow attackers to redirect users to a malicious website."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "Open Redirect (CWE-601)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-02-02T14:06:25.426854",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "url": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/"
        },
        {
          "name": "[oss-security] 20211214 [CVE-2021-44528] Possible Open Redirect in Host Authorization Middleware",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/12/14/5"
        },
        {
          "name": "DSA-5372",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2023/dsa-5372"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240202-0005/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2021-22942",
    "datePublished": "2021-10-18T00:00:00",
    "dateReserved": "2021-01-06T00:00:00",
    "dateUpdated": "2024-08-03T18:58:26.009Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

ghsa-2rqw-v265-jf8c

Vulnerability from github

Published

2021-08-26 20:36

Modified

2024-02-02 16:47

Severity ?

6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Summary

Open Redirect in ActionPack

Details

Overview

There is a possible open redirect vulnerability in the Host Authorization middleware in Action Pack. This vulnerability has been assigned the CVE identifier CVE-2021-22942.

Versions Affected: >= 6.0.0. Not affected: < 6.0.0 Fixed Versions: 6.1.4.1, 6.0.4.1

Impact

Specially crafted “X-Forwarded-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.

Impacted applications will have allowed hosts with a leading dot. For example, configuration files that look like this:

ruby config.hosts << '.EXAMPLE.com'

When an allowed host contains a leading dot, a specially crafted Host header can be used to redirect to a malicious website.

This vulnerability is similar to CVE-2021-22881, but CVE-2021-22881 did not take in to account domain name case sensitivity.

Releases

The fixed releases are available at the normal locations.

Workarounds

In the case a patch can’t be applied, the following monkey patch can be used in an initializer:

```ruby module ActionDispatch class HostAuthorization HOSTNAME = /[a-z0-9.-]+|[[a-f0-9]*:[a-f0-9.:]+]/i VALID_ORIGIN_HOST = /\A(#{HOSTNAME})(?::\d+)?\z/ VALID_FORWARDED_HOST = /(?:\A|,[ ]?)(#{HOSTNAME})(?::\d+)?\z/

private
  def authorized?(request)
    origin_host =
      request.get_header("HTTP_HOST")&.slice(VALID_ORIGIN_HOST, 1) || ""
    forwarded_host =
      request.x_forwarded_host&.slice(VALID_FORWARDED_HOST, 1) || ""
    @permissions.allows?(origin_host) &&
      (forwarded_host.blank? || @permissions.allows?(forwarded_host))
  end

end end ```

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.0.4"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionpack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.0.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.1.4"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionpack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.1.0"
            },
            {
              "fixed": "6.1.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-22942"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-26T20:36:25Z",
    "nvd_published_at": "2021-10-18T13:15:00Z",
    "severity": "MODERATE"
  },
  "details": "# Overview\n\nThere is a possible open redirect vulnerability in the Host Authorization middleware in Action Pack. This vulnerability has been assigned the CVE identifier CVE-2021-22942.\n\nVersions Affected: \u003e= 6.0.0.\nNot affected: \u003c 6.0.0\nFixed Versions: 6.1.4.1, 6.0.4.1\n\n# Impact\n\nSpecially crafted \u201cX-Forwarded-Host\u201d headers in combination with certain \u201callowed host\u201d formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.\n\nImpacted applications will have allowed hosts with a leading dot. For example, configuration files that look like this:\n\n```ruby\nconfig.hosts \u003c\u003c  \u0027.EXAMPLE.com\u0027\n```\n\nWhen an allowed host contains a leading dot, a specially crafted Host header can be used to redirect to a malicious website.\n\nThis vulnerability is similar to CVE-2021-22881, but CVE-2021-22881 did not take in to account domain name case sensitivity.\n\n# Releases\n\nThe fixed releases are available at the normal locations.\n\n# Workarounds\n\nIn the case a patch can\u2019t be applied, the following monkey patch can be used in an initializer:\n\n```ruby\nmodule ActionDispatch\n  class HostAuthorization\n    HOSTNAME = /[a-z0-9.-]+|\\[[a-f0-9]*:[a-f0-9.:]+\\]/i\n    VALID_ORIGIN_HOST = /\\A(#{HOSTNAME})(?::\\d+)?\\z/\n    VALID_FORWARDED_HOST = /(?:\\A|,[ ]?)(#{HOSTNAME})(?::\\d+)?\\z/\n\n    private\n      def authorized?(request)\n        origin_host =\n          request.get_header(\"HTTP_HOST\")\u0026.slice(VALID_ORIGIN_HOST, 1) || \"\"\n        forwarded_host =\n          request.x_forwarded_host\u0026.slice(VALID_FORWARDED_HOST, 1) || \"\"\n        @permissions.allows?(origin_host) \u0026\u0026\n          (forwarded_host.blank? || @permissions.allows?(forwarded_host))\n      end\n  end\nend\n```\n",
  "id": "GHSA-2rqw-v265-jf8c",
  "modified": "2024-02-02T16:47:01Z",
  "published": "2021-08-26T20:36:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-22942"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/cve-2021-22942"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rails/rails"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c"
    },
    {
      "type": "WEB",
      "url": "https://rubygems.org/gems/actionpack"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20240202-0005"
    },
    {
      "type": "WEB",
      "url": "https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2023/dsa-5372"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2021/12/14/5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open Redirect in ActionPack"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted

gsd-2021-22942

Vulnerability from gsd

cve-2021-22942

Vulnerability from cvelistv5

ghsa-2rqw-v265-jf8c

Vulnerability from github

Overview

Impact

Releases

Workarounds

Tags

Sightings

Nomenclature