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CVE-2020-14002

Estado: ModificadaMedia (5.9)—

PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).

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 (3)

Fedoraproject — FedoraNetapp — Oncommand Unified Manager Core PackagePutty — Putty

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-14002",
  "cveTags": [],
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        "type": "Primary",
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
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  "affected": [
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  "published": "2020-06-29T18:15:11.767",
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-203"
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      "lang": "en",
      "value": "PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client)."
    },
    {
      "lang": "es",
      "value": "PuTTY versiones 0.68 hasta 0.73, presenta una Discrepancia Observable que conlleva a una filtración de información en la negociación del algoritmo. Esto permite a atacantes de tipo man-in-the-middle apuntar a los intentos iniciales de conexión (donde ninguna clave de host para el servidor ha sido almacenada en caché por parte del cliente)"
    }
  ],
  "lastModified": "2026-06-17T02:54:05.113",
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