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CVE-2021-27208

Estado: ModificadaMedia (6.8)—

When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification of the board assembly on which the Zynq-7000 SoC device mounted is needed to replace the original NAND flash memory with a NAND flash emulation device for this attack to be successful.

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)

Xilinx — Zynq-7000 FirmwareXilinx — Zynq-7000s Firmware

CWE

Referencias

JSON original (NVD)

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          "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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  "published": "2021-03-15T13:15:14.967",
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      "tags": [
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  "vulnStatus": "Modified",
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      "value": "When booting a Zync-7000 SOC device from nand flash memory, the nand driver in the ROM does not validate the inputs when reading in any parameters in the nand’s parameter page. IF a field read in from the parameter page is too large, this causes a buffer overflow that could lead to arbitrary code execution. Physical access and modification of the board assembly on which the Zynq-7000 SoC device mounted is needed to replace the original NAND flash memory with a NAND flash emulation device for this attack to be successful."
    },
    {
      "lang": "es",
      "value": "Cuando se arranca un dispositivo Zync-7000 SOC desde la memoria flash nand, el controlador nand en la ROM no comprueba las entradas cuando se leen en parámetros any en la página de parámetros nand. SI un campo leído desde la página de parámetros es demasiado grande, esto causa un desbordamiento del búfer que podría conllevar a una ejecución de código arbitraria. Es necesario un acceso físico y modificación al dispositivo Zynq-7000 para reemplazar la memoria flash nand original con un emulador flash nand para que este ataque tenga éxito"
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  ],
  "lastModified": "2026-06-17T03:44:28.000",
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