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CVE-2019-11728

Estado: ModificadaMedia (4.7)—

El encabezado HTTP Alternative Services, Alt-Svc, puede ser usado por un sitio malicioso para analizar todos los puertos TCP de cualquier host que sean accesibles por un usuario cuando sea cargado el contenido web. Esta vulnerabilidad afecta a Firefox anterior a versión 68.

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 (2)

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2019-11728",
  "cveTags": [],
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
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          "userInteraction": "REQUIRED",
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  "affected": [
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      "affectedData": [
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          "vendor": "Mozilla",
          "product": "Firefox",
          "versions": [
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  "published": "2019-07-23T14:15:16.513",
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          "lang": "en",
          "value": "CWE-668"
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  "descriptions": [
    {
      "lang": "en",
      "value": "The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded. This vulnerability affects Firefox < 68."
    },
    {
      "lang": "es",
      "value": "El encabezado HTTP Alternative Services, Alt-Svc, puede ser usado por un sitio malicioso para analizar todos los puertos TCP de cualquier host que sean accesibles por un usuario cuando sea cargado el contenido web. Esta vulnerabilidad afecta a Firefox anterior a versión 68."
    }
  ],
  "lastModified": "2026-06-17T02:13:30.993",
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