CVE-2012-4557

Estado: ModificadaMedia (5)—
The mod_proxy_ajp module in the Apache HTTP Server 2.2.12 through 2.2.21 places a worker node into an error state upon detection of a long request-processing time, which allows remote attackers to cause a denial of service (worker consumption) via an expensive request.
CVSS

Versión: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Puntuación base: 5
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 17%
Percentil entre todas las CVEs puntuadas: 97
Fecha de la puntuación: 7/10/2026
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 (1)

Apache — Http Server
CWE

CWE-399
Referencias

JSON original (NVD)

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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
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        "obtainOtherPrivilege": false,
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  "published": "2012-11-30T19:55:01.050",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-399"
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  "descriptions": [
    {
      "lang": "en",
      "value": "The mod_proxy_ajp module in the Apache HTTP Server 2.2.12 through 2.2.21 places a worker node into an error state upon detection of a long request-processing time, which allows remote attackers to cause a denial of service (worker consumption) via an expensive request."
    },
    {
      "lang": "es",
      "value": "El módulo mod_proxy_ajp en el Servidor HTTP Apache v2.2.12 por v2.2.21 coloca un nodo de trabajo en un estado de error ante la detección de un tiempo de procesamiento de solicitudes demasiado elevado, lo que permite a atacantes remotos provocar una denegación de servicio (consumo de nodos de trabajo) a través de un solicitud compleja.\r\n"
    }
  ],
  "lastModified": "2026-06-16T23:45:23.107",
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