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CVE-2019-9815

Estado: ModificadaAlta (8.1)—

Si el hyperthreading no está deshabilitado, existe una vulnerabilidad de ataque de sincronización, similar a los ataques de tipo Spectre anteriores. Apple ha distribuido macOS versión 10.14.5 con una opción para deshabilitar el hyperthreading en aplicaciones que ejecutan código no confiable en un hilo (subproceso) por medio de un nuevo sysctl. Firefox ahora lo utiliza en el hilo (subproceso) principal y en cualquier hilo (subproceso) de trabajo. *Nota: los usuarios deben actualizar a macOS versión 10.14.5 para tomar ventaja de este cambio. *. Esta vulnerabilidad afecta a Thunderbird anterior a versión 60.7, Firefox anterior a versión 67 y Firefox ESR anterior a versión 60.7.

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 (3)

Mozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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  "published": "2019-07-23T14:15:17.030",
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      "value": "If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks. Apple has shipped macOS 10.14.5 with an option to disable hyperthreading in applications running untrusted code in a thread through a new sysctl. Firefox now makes use of it on the main thread and any worker threads. *Note: users need to update to macOS 10.14.5 in order to take advantage of this change.*. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7."
    },
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      "lang": "es",
      "value": "Si el hyperthreading no está deshabilitado, existe una vulnerabilidad de ataque de sincronización, similar a los ataques de tipo Spectre anteriores. Apple ha distribuido macOS versión 10.14.5 con una opción para deshabilitar el hyperthreading en aplicaciones que ejecutan código no confiable en un hilo (subproceso) por medio de un nuevo sysctl. Firefox ahora lo utiliza en el hilo (subproceso) principal y en cualquier hilo (subproceso) de trabajo. *Nota: los usuarios deben actualizar a macOS versión 10.14.5 para tomar ventaja de este cambio. *. Esta vulnerabilidad afecta a Thunderbird anterior a versión 60.7, Firefox anterior a versión 67 y Firefox ESR anterior a versión 60.7."
    }
  ],
  "lastModified": "2026-06-17T02:44:39.440",
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