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CVE-2020-28924

Estado: ModificadaAlta (7.5)—

An issue was discovered in Rclone before 1.53.3. Due to the use of a weak random number generator, the password generator has been producing weak passwords with much less entropy than advertised. The suggested passwords depend deterministically on the time the second rclone was started. This limits the entropy of the passwords enormously. These passwords are often used in the crypt backend for encryption of data. It would be possible to make a dictionary of all possible passwords with about 38 million entries per password length. This would make decryption of secret material possible with a plausible amount of effort. NOTE: all passwords generated by affected versions should be changed.

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)

Fedoraproject — FedoraRclone — Rclone

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2020-28924",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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  "affected": [
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      "affectedData": [
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  "published": "2020-11-19T20:15:12.983",
  "references": [
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      "url": "https://github.com/rclone/rclone/issues/4783",
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      "url": "https://security.gentoo.org/glsa/202107-14",
      "tags": [
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
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      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-331"
        },
        {
          "lang": "en",
          "value": "CWE-338"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Rclone before 1.53.3. Due to the use of a weak random number generator, the password generator has been producing weak passwords with much less entropy than advertised. The suggested passwords depend deterministically on the time the second rclone was started. This limits the entropy of the passwords enormously. These passwords are often used in the crypt backend for encryption of data. It would be possible to make a dictionary of all possible passwords with about 38 million entries per password length. This would make decryption of secret material possible with a plausible amount of effort. NOTE: all passwords generated by affected versions should be changed."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en Rclone versiones anteriores a 1.53.3. Debido al uso de un generador de números aleatorios débil, el generador de contraseñas ha estado produciendo contraseñas débiles con mucha menos entropía de la anunciada. Las contraseñas sugeridas dependen determinísticamente de la hora en que se inició el segundo rclone. Esto limita enormemente la entropía de las contraseñas. Estas contraseñas se utilizan a menudo en el backend crypt para el cifrado de datos. Sería posible construir un diccionario de todas las contraseñas posibles con aproximadamente 38 millones de entradas por longitud de contraseña. Esto haría posible el descifrado de material secreto con una cantidad plausible de esfuerzo. NOTA: todas las contraseñas generadas mediante las versiones afectadas deben ser cambiadas"
    }
  ],
  "lastModified": "2026-06-17T03:10:50.093",
  "configurations": [
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}