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CVE-2021-30633

Estado: AnalizadaCrítica (9.6)⚠ Explotación activa

Un uso de memoria previamente liberada en la API de la base de datos Indexada en Google Chrome versiones anteriores a 93.0.4577.82, permitía a un atacante remoto que hubiera comprometido el proceso del renderizador llevar a cabo potencialmente un escape de 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.

Requiere interacción del usuario (UI:R) con HTML malicioso. El use-after-free en Indexed DB permite escape de sandbox y ejecución de código con privilegios elevados en el contexto del navegador (C:H/I:H/A:H crítico).

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

Privileged Account ManagementExecution PreventionAuditUpdate SoftwareUser Account ManagementRestrict Web-Based Content

Tecnologías afectadas (2)

Fedoraproject — FedoraGoogle — Chrome

CWE

Referencias

JSON original (NVD)

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          "options": [
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          "version": "2.0.3",
          "timestamp": "2025-01-29T16:51:06.707078Z"
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        "obtainAllPrivilege": false,
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      "tags": [
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
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  ],
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      "lang": "en",
      "value": "Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page."
    },
    {
      "lang": "es",
      "value": "Un uso de memoria previamente liberada en la API de la base de datos Indexada en Google Chrome versiones anteriores a 93.0.4577.82, permitía a un atacante remoto que hubiera comprometido el proceso del renderizador llevar a cabo potencialmente un escape de sandbox por medio de una página HTML diseñada"
    }
  ],
  "lastModified": "2026-06-17T03:50:36.010",
  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
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  "sourceIdentifier": "chrome-cve-admin@google.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Google Chromium Indexed DB API Use-After-Free Vulnerability"
}