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CVE-2018-14779

Estado: ModificadaMedia (6.8)—

A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver. The file lib/ykpiv.c contains the following code in the function `ykpiv_transfer_data()`: {% highlight c %} if(*out_len + recv_len - 2 > max_out) { fprintf(stderr, "Output buffer to small, wanted to write %lu, max was %lu.", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- it is clearly checked whether the buffer is big enough to hold the data copied using `memcpy()`, but no error handling happens to avoid the `memcpy()` in such cases. This code path can be triggered with malicious data coming from a smartcard.

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)

Yubico — PIV ManagerYubico — PIV ToolYubico — Smart Card Minidriver

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2018-14779",
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      "value": "A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver. The file lib/ykpiv.c contains the following code in the function `ykpiv_transfer_data()`: {% highlight c %} if(*out_len + recv_len - 2 > max_out) { fprintf(stderr, \"Output buffer to small, wanted to write %lu, max was %lu.\", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- it is clearly checked whether the buffer is big enough to hold the data copied using `memcpy()`, but no error handling happens to avoid the `memcpy()` in such cases. This code path can be triggered with malicious data coming from a smartcard."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto una vulnerabilidad de desbordamiento de búfer en el controlador de tarjetas inteligentes de Yubico-Piv 1.5.0. El archivo lib/ykpiv.c contiene el siguiente código en la función \"ykpiv_transfer_data()\": {% highlight c %} if(*out_len + recv_len - 2 > max_out) { fprintf(stderr, \"Output buffer to small, wanted to write %lu, max was %lu.\", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- Se comprueba claramente si el búfer es lo suficientemente grande para contener los datos copiados usando \"memcpy()\", pero no se manejan los errores para evitar el \"memcpy()\" en estos casos. Esta ruta de código se puede desencadenar con datos maliciosos provenientes de una tarjeta inteligente."
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  "lastModified": "2026-06-17T01:41:37.347",
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