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CVE-2019-9516

Estado: ModificadaMedia (6.5)—

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

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 (19)

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2019-9516",
  "cveTags": [],
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 6.9,
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        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-400"
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-770"
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      "lang": "en",
      "value": "Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory."
    },
    {
      "lang": "es",
      "value": "Algunas implementaciones de HTTP / 2 son vulnerables a una fuga de encabezado, lo que puede conducir a una denegación de servicio. El atacante envía una secuencia de encabezados con un nombre de encabezado de longitud 0 y un valor de encabezado de longitud 0, opcionalmente Huffman codificado en encabezados de 1 byte o más. Algunas implementaciones asignan memoria para estos encabezados y mantienen viva la asignación hasta que la sesión muere. Esto puede consumir un exceso de memoria."
    }
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  "lastModified": "2026-06-17T02:43:53.023",
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