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CVE-2019-11759

Estado: ModificadaAlta (8.8)—

Un atacante podría haber causado que 4 bytes de salida HMAC se escribieran más allá del final de un búfer almacenado en la pila. Esto podría ser usado por un atacante para ejecutar código arbitrario o, más probablemente, conllevar a un bloqueo. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versión 70, Thunderbird versiones anteriores la versión 68.2 y Firefox ESR versiones anteriores a la versión 68.2.

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)

Canonical — Ubuntu LinuxMozilla — FirefoxMozilla — Firefox ESRMozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2019-11759",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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  "affected": [
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      "description": [
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          "value": "CWE-120"
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      "value": "An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2."
    },
    {
      "lang": "es",
      "value": "Un atacante podría haber causado que 4 bytes de salida HMAC se escribieran más allá del final de un búfer almacenado en la pila. Esto podría ser usado por un atacante para ejecutar código arbitrario o, más probablemente, conllevar a un bloqueo. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versión  70, Thunderbird versiones anteriores la versión 68.2 y Firefox ESR versiones anteriores a la versión 68.2."
    }
  ],
  "lastModified": "2026-06-17T02:13:35.067",
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