FKIE_CVE-2021-39171

Vulnerability from fkie_nvd - Published: 2021-08-27 22:15 - Updated: 2026-06-17 04:03
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Passport-SAML is a SAML 2.0 authentication provider for Passport, the Node.js authentication library. Prior to version 3.1.0, a malicious SAML payload can require transforms that consume significant system resources to process, thereby resulting in reduced or denied service. This would be an effective way to perform a denial-of-service attack. This has been resolved in version 3.1.0. The resolution is to limit the number of allowable transforms to 2.
References
security-advisories@github.comhttps://github.com/node-saml/passport-saml/pull/595Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/node-saml/passport-saml/pull/595Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2Third Party Advisory
Impacted products
Vendor Product Version
passport-saml_project passport-saml *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "passport-saml",
          "vendor": "node-saml",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.1.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:passport-saml_project:passport-saml:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "C05B72FD-D09E-4D1F-AE7C-F3E101B60045",
              "versionEndExcluding": "3.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Passport-SAML is a SAML 2.0 authentication provider for Passport, the Node.js authentication library. Prior to version 3.1.0, a malicious SAML payload can require transforms that consume significant system resources to process, thereby resulting in reduced or denied service. This would be an effective way to perform a denial-of-service attack. This has been resolved in version 3.1.0. The resolution is to limit the number of allowable transforms to 2."
    },
    {
      "lang": "es",
      "value": "Passport-SAML es un proveedor de autenticaci\u00f3n SAML versi\u00f3n 2.0 para Passport, la biblioteca de autenticaci\u00f3n de Node.js. Anterior a la versi\u00f3n 3.1.0, una carga \u00fatil SAML maliciosa puede requerir transformaciones que consumen recursos significativos del sistema para procesar, y por lo tanto, resultando en un servicio reducido o denegado. Esta ser\u00eda una manera efectiva de llevar a cabo un ataque de denegaci\u00f3n de servicio. Esto ha sido resuelto en versi\u00f3n 3.1.0. La resoluci\u00f3n consiste en limitar el n\u00famero de transformaciones permitidas a 2."
    }
  ],
  "id": "CVE-2021-39171",
  "lastModified": "2026-06-17T04:03:14.560",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "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,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "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:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "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,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-08-27T22:15:07.267",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/node-saml/passport-saml/pull/595"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/node-saml/passport-saml/pull/595"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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