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CVE-2021-3446

Estado: ModificadaMedia (5.5)—

A flaw was found in libtpms in versions before 0.8.2. The commonly used integration of libtpms with OpenSSL contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality.

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 — FedoraLibtpms Project — LibtpmsRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-3446",
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          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
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        "obtainAllPrivilege": false,
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
          "product": "libtpms",
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  "published": "2021-03-25T19:15:14.703",
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        "Third Party Advisory"
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      "value": "A flaw was found in libtpms in versions before 0.8.2. The commonly used integration of libtpms with OpenSSL contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality."
    },
    {
      "lang": "es",
      "value": "Se encontró un fallo en libtpms en versiones anteriores a 0.8.2. La integración comúnmente usada de libtpms con OpenSSL contenía una vulnerabilidad relacionada con el IV devuelto (vector de inicialización) cuando se usaban determinados cifrados simétricos. En lugar de devolver el último IV, devolvió el IV inicial a la persona que llama, debilitando así los pasos posteriores de cifrado y descifrado. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos"
    }
  ],
  "lastModified": "2026-06-17T04:05:06.950",
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