gsd-2021-22903
Vulnerability from gsd
Modified
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
Aliases
CVE-2021-22903


To clipboard 

{
  "GSD": {
    "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",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-22903.html",
      "https://security.archlinux.org/CVE-2021-22903"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "actionpack",
            "purl": "pkg:gem/actionpack"
          }
        }
      ],
      "aliases": [
        "CVE-2021-22903",
        "GHSA-5hq2-xf89-9jxq"
      ],
      "details": "There is a possible Open Redirect Vulnerability in Action Pack. This\nvulnerability has been assigned the CVE identifier CVE-2021-22903.\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\ncombination with certain \"allowed host\" formats can cause the Host\nAuthorization 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\ndot are converted to regular expressions without proper escaping. This causes,\nfor example, config.hosts \u003c\u003c \"sub.example.com\" to permit a request with a Host\nheader value of sub-example.com.\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",
      "id": "GSD-2021-22903",
      "modified": "2021-05-05T00:00:00.000Z",
      "published": "2021-05-05T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://groups.google.com/g/rubyonrails-security/c/8TxqXEtgSF0"
        }
      ],
      "related": [
        "CVE-2021-22881"
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 6.1,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Possible Open Redirect Vulnerability in Action Pack"
    }
  },
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                    "product_name": "https://github.com/rails/rails",
                    "version": {
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                          "version_value": "Fixed in 6.1.3.2"
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    },
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      "cve": "2021-22903",
      "cvss_v3": 6.1,
      "date": "2021-05-05",
      "description": "There is a possible Open Redirect Vulnerability in Action Pack. This\nvulnerability has been assigned the CVE identifier CVE-2021-22903.\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\ncombination with certain \"allowed host\" formats can cause the Host\nAuthorization 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\ndot are converted to regular expressions without proper escaping. This causes,\nfor example, config.hosts \u003c\u003c \"sub.example.com\" to permit a request with a Host\nheader value of sub-example.com.\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",
      "framework": "rails",
      "gem": "actionpack",
      "ghsa": "5hq2-xf89-9jxq",
      "patched_versions": [
        "\u003e= 6.1.3.2"
      ],
      "related": {
        "cve": [
          "2021-22881"
        ]
      },
      "title": "Possible Open Redirect Vulnerability in Action Pack",
      "unaffected_versions": [
        "\u003c 6.1.0.rc2"
      ],
      "url": "https://groups.google.com/g/rubyonrails-security/c/8TxqXEtgSF0"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c6.1.3.2",
          "affected_versions": "All versions before 6.1.3.2",
          "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": "2021-06-22",
          "description": "The actionpack ruby gem 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.",
          "fixed_versions": [
            "6.1.3.2"
          ],
          "identifier": "CVE-2021-22903",
          "identifiers": [
            "CVE-2021-22903"
          ],
          "not_impacted": "All versions starting from 6.1.3.2",
          "package_slug": "gem/actionpack",
          "pubdate": "2021-06-11",
          "solution": "Upgrade to version 6.1.3.2 or above.",
          "title": "URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-22903",
            "https://hackerone.com/reports/1148025"
          ],
          "uuid": "669f8ad3-cea6-4de6-9b47-08c1d9aff085"
        },
        {
          "affected_range": "\u003e=6.1.0 \u003c=6.1.3.2",
          "affected_versions": "All versions starting from 6.1.0 up to 6.1.3.2",
          "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": "2021-10-21",
          "description": "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.",
          "fixed_versions": [
            "6.1.4"
          ],
          "identifier": "CVE-2021-22903",
          "identifiers": [
            "CVE-2021-22903"
          ],
          "not_impacted": "All versions before 6.1.0, all versions after 6.1.3.2",
          "package_slug": "gem/rails",
          "pubdate": "2021-06-11",
          "solution": "Upgrade to version 6.1.4 or above.",
          "title": "URL Redirection to Untrusted Site (Open Redirect)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-22903",
            "https://groups.google.com/g/rubyonrails-security/c/8TxqXEtgSF0"
          ],
          "uuid": "d83ed165-0122-4c11-a5e2-218de9bb42a6"
        }
      ]
    },
    "nvd.nist.gov": {
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                "cpe23Uri": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "6.1.3.2",
                "versionStartIncluding": "6.1.1",
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              }
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      "impact": {
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          "cvssV2": {
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            "accessVector": "NETWORK",
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            "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
        },
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            "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"
    }
  }
}


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