FKIE_CVE-2021-23401

Vulnerability from fkie_nvd - Published: 2021-07-05 11:15 - Updated: 2024-11-21 05:51
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
This affects all versions of package Flask-User. When using the make_safe_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as /////evil.com/path or \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.
References
report@snyk.iohttps://github.com/lingthio/Flask-UserProduct, Third Party Advisory
report@snyk.iohttps://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.pyExploit, Third Party Advisory
report@snyk.iohttps://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/lingthio/Flask-UserProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.pyExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188Third Party Advisory
Impacted products
Vendor Product Version
flask-user_project flask-user *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:flask-user_project:flask-user:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D3595F3F-8222-4028-AD86-88BAF66AB779",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "This affects all versions of package Flask-User. When using the make_safe_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as /////evil.com/path or \\\\\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using \u0027autocorrect_location_header=False."
    },
    {
      "lang": "es",
      "value": "Esto afecta a todas las versiones del paquete Flask-User. Cuando se usa la funci\u00f3n make_safe_url, es posible omitir la comprobaci\u00f3n de la URL y redirigir a un usuario a una URL arbitraria al proporcionar m\u00faltiples barras invertidas, tal y como /////evil.com/path o \\\\\\\\evil.com/path. Esta vulnerabilidad es s\u00f3lo explotable si un servidor WSGI alternativo que no sea Werkzeug  es usado, o es modificado el comportamiento predeterminado de Werkzeug usando \"autocorrect_location_header=False"
    }
  ],
  "id": "CVE-2021-23401",
  "lastModified": "2024-11-21T05:51:39.050",
  "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": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "report@snyk.io",
        "type": "Secondary"
      },
      {
        "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": "2021-07-05T11:15:07.670",
  "references": [
    {
      "source": "report@snyk.io",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://github.com/lingthio/Flask-User"
    },
    {
      "source": "report@snyk.io",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"
    },
    {
      "source": "report@snyk.io",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://github.com/lingthio/Flask-User"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"
    }
  ],
  "sourceIdentifier": "report@snyk.io",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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