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CVE-2020-14968

Estado: ModificadaCrítica (9.8)—

An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Kjur — JsrsasignNetapp — MAX Data

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-14968",
  "cveTags": [],
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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  },
  "affected": [
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      "affectedData": [
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  "published": "2020-06-22T12:15:10.227",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en el paquete jsrsasign versiones anteriores a 8.0.17 para Node.js. La implementación de RSASSA-PSS (RSA-PSS) no detecta la manipulación y modificación de firma al anteponer bytes \"\\0\" a una firma (acepta estas firmas modificadas como válidas). Un atacante puede abusar de este comportamiento en una aplicación al crear múltiples firmas válidas donde solo debe existir una firma. Además, un atacante podría anteponer estos bytes con el objetivo de desencadenar problemas de corrupción de la memoria"
    }
  ],
  "lastModified": "2026-06-22T03:18:31.867",
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}