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CVE-2023-6935

Estado: ModificadaMedia (5.9)—

wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure:

--enable-all CFLAGS="-DWOLFSSL_STATIC_RSA"

The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with "--enable-all", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent.

The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.

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 (1)

Wolfssl — Wolfssl

CWE

Referencias

JSON original (NVD)

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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-02-12T12:48:11.895530Z"
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    "cvssMetricV31": [
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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",
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          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
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      "value": "wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure:\n\n--enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\"\n\nThe define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with \"--enable-all\", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent.\n\nThe vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.\n"
    },
    {
      "lang": "es",
      "value": "wolfSSL SP Math Toda la implementación de RSA es vulnerable al ataque Marvin, una nueva variación de un ataque de sincronización de estilo Bleichenbacher, cuando se construye con las siguientes opciones para configurar: --enable-all CFLAGS=\"-DWOLFSSL_STATIC_RSA\" La definición \"WOLFSSL_STATIC_RSA\" habilita RSA estático conjuntos de cifrado, que no se recomienda y ha estado deshabilitado de forma predeterminada desde wolfSSL 3.6.6. Por lo tanto, la compilación predeterminada desde 3.6.6, incluso con \"--enable-all\", no es vulnerable al ataque Marvin. La vulnerabilidad es específica de los conjuntos de cifrado RSA estáticos y se espera que sea independiente del relleno. La vulnerabilidad permite a un atacante descifrar textos cifrados y falsificar firmas después de realizar una gran cantidad de observaciones de prueba. Sin embargo, la clave privada del servidor no está expuesta."
    }
  ],
  "lastModified": "2026-06-17T06:51:43.017",
  "configurations": [
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          "negate": false,
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}