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CVE-2019-14356

Estado: ModificadaMedia (5.3)—

On Coldcard MK1 and MK2 devices, a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels, allowing a partial recovery of display contents. For example, a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words, the side channel is relevant only if the attacker has enough control over the device's USB connection to make power-consumption measurements at a time when secret data is displayed.

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The side channel is not relevant in other circumstances, such as a stolen device that is not currently displaying secret data. On Coldcard MK1 and MK2 devices, a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels, allowing a partial recovery of display contents. For example, a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words, the side channel is relevant only if the attacker has enough control over the device's USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances, such as a stolen device that is not currently displaying secret data. NOTE: At Coinkite, we’ve already mitigated it, even though we feel strongly that it is not a legitimate issue. In our opinion, it is both unproven (might not even work) and also completely impractical—even if it could be made to work perfectly

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)

Coinkite — Coldcard MK1 FirmwareCoinkite — Coldcard MK2 Firmware

CWE

Referencias

JSON original (NVD)

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  "published": "2019-10-31T18:15:11.427",
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      "description": [
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      "lang": "en",
      "value": "On Coldcard MK1 and MK2 devices, a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels, allowing a partial recovery of display contents. For example, a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words, the side channel is relevant only if the attacker has enough control over the device's USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances, such as a stolen device that is not currently displaying secret data. On Coldcard MK1 and MK2 devices, a side channel for the row-based OLED display was found. The power consumption of each row-based display cycle depends on the number of illuminated pixels, allowing a partial recovery of display contents. For example, a hardware implant in the USB cable might be able to leverage this behavior to recover confidential secrets such as the PIN and BIP39 mnemonic. In other words, the side channel is relevant only if the attacker has enough control over the device's USB connection to make power-consumption measurements at a time when secret data is displayed. The side channel is not relevant in other circumstances, such as a stolen device that is not currently displaying secret data. NOTE: At Coinkite, we’ve already mitigated it, even though we feel strongly that it is not a legitimate issue. In our opinion, it is both unproven (might not even work) and also completely impractical—even if it could be made to work perfectly"
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      "value": "** EN DISPUTA ** En los dispositivos Coldcard MK1 y MK2, se encontró un canal lateral para la pantalla OLED basada en filas. El consumo de energía de cada ciclo de visualización basado en filas depende del número de píxeles iluminados, lo que permite una recuperación parcial del contenido de la pantalla. Por ejemplo, un implante de hardware en el cable USB podría aprovechar este comportamiento para recuperar secretos confidenciales como el PIN y el mnemónico BIP39. En otras palabras, el canal lateral es relevante solo si el atacante tiene suficiente control sobre la conexión USB del dispositivo para realizar mediciones de consumo de energía en un momento en que se muestran datos secretos. El canal lateral no es relevante en otras circunstancias, como un dispositivo robado que actualmente no muestra datos secretos. En los dispositivos Coldcard MK1 y MK2, se encontró un canal lateral para la pantalla OLED basada en filas. El consumo de energía de cada ciclo de visualización basado en filas depende del número de píxeles iluminados, lo que permite una recuperación parcial del contenido de la pantalla. Por ejemplo, un implante de hardware en el cable USB podría aprovechar este comportamiento para recuperar secretos confidenciales como el PIN y el mnemónico BIP39. En otras palabras, el canal lateral es relevante solo si el atacante tiene suficiente control sobre la conexión USB del dispositivo para realizar mediciones de consumo de energía en un momento en que se muestran datos secretos. El canal lateral no es relevante en otras circunstancias, como un dispositivo robado que actualmente no muestra datos secretos. NOTA: En Coinkite, ya lo hemos mitigado, aunque creemos firmemente que no es un problema legítimo. En nuestra opinión, no está comprobado (puede que ni siquiera funcione) y también es completamente poco práctico, incluso si pudiera funcionar perfectamente."
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  "lastModified": "2026-06-17T02:18:16.203",
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