FKIE_CVE-2021-46743

Vulnerability from fkie_nvd - Published: 2022-03-29 07:15 - Updated: 2024-11-21 06:34
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way to use the PHP-JWT library unsafely, but might not be considered a vulnerability in the library itself.
References
cve@mitre.orghttps://github.com/firebase/php-jwt/issues/351Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/firebase/php-jwt/issues/351Exploit, Third Party Advisory
Impacted products
Vendor Product Version
google firebase_php-jwt *
To clipboard 

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              "criteria": "cpe:2.3:a:google:firebase_php-jwt:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "53E1DE57-9D25-4B98-83B6-C35BDD065D88",
              "versionEndExcluding": "6.0.0",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way to use the PHP-JWT library unsafely, but might not be considered a vulnerability in the library itself."
    },
    {
      "lang": "es",
      "value": "En Firebase PHP-JWT versiones anteriores a 6.0.0, se presenta un problema de confusi\u00f3n de algoritmos (por ejemplo, RS256 / HS256) por medio del encabezado kid (tambi\u00e9n se conoce como Key ID), cuando son cargados varios tipos de claves en un llavero. Esto permite a un atacante falsificar tokens que son comprobados bajo la clave incorrecta. NOTA: esto proporciona una forma directa de usar la biblioteca PHP-JWT de forma no segura, pero podr\u00eda no considerarse una vulnerabilidad en la propia biblioteca"
    }
  ],
  "id": "CVE-2021-46743",
  "lastModified": "2024-11-21T06:34:37.197",
  "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",
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          "baseScore": 9.1,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
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        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  },
  "published": "2022-03-29T07:15:07.017",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Third Party Advisory"
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      "url": "https://github.com/firebase/php-jwt/issues/351"
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  "vulnStatus": "Modified",
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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