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CVE-2021-33285

Estado: ModificadaAlta (7.8)—

In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the "bytes_in_use" field should be less than the "bytes_allocated" field. When it is not, the parsing of the records proceeds into the wild.

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 (4)

Debian — Debian LinuxFedoraproject — FedoraRedhat — Enterprise LinuxTuxera — Ntfs-3g

CWE

Referencias

JSON original (NVD)

Mostrar
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      "description": [
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          "lang": "en",
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      "value": "In NTFS-3G versions < 2021.8.22, when a specially crafted NTFS attribute is supplied to the function ntfs_get_attribute_value, a heap buffer overflow can occur allowing for memory disclosure or denial of service. The vulnerability is caused by an out-of-bound buffer access which can be triggered by mounting a crafted ntfs partition. The root cause is a missing consistency check after reading an MFT record : the \"bytes_in_use\" field should be less than the \"bytes_allocated\" field. When it is not, the parsing of the records proceeds into the wild."
    },
    {
      "lang": "es",
      "value": "En NTFS-3G versiones anteriores a 2021.8.22, cuando es suministrado un atributo NTFS especialmente diseñado a la función ntfs_get_attribute_value, puede ocurrir un desbordamiento del búfer de la pila, permitiendo una divulgación de memoria o una denegación de servicio. La vulnerabilidad es causada por un acceso al búfer fuera de límites que puede ser desencadenado al montar una partición ntfs diseñada. La causa principal es una falta de comprobación de consistencia después de leer un registro MFT: el campo \"bytes_in_use\" debería ser menor que el campo \"bytes_allocated\". Cuando no lo es, el análisis de los registros procede de forma salvaje"
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  "lastModified": "2026-06-17T03:54:24.827",
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