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CVE-2021-37973

Estado: AnalizadaCrítica (9.6)⚠ Explotación activa

Un uso de memoria previamente liberada en Portals en Google Chrome versiones anteriores a 94.0.4606.61, permitía que un atacante remoto que hubiera comprometido el proceso de renderización pudiera llevar a cabo un escape del sandbox por medio de una página HTML diseñada

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).

CISA KEV — explotada activamente

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Use after free en Portals de Chrome permite ejecución remota tras interacción del usuario (UI:R) con página HTML maliciosa. Sandbox escape implica escalada a nivel del sistema operativo.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (3)

Debian — Debian LinuxFedoraproject — FedoraGoogle — Chrome

CWE

Referencias

JSON original (NVD)

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    },
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}