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CVE-2012-3406

Estado: ModificadaMedia (6.8)—

The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not "properly restrict the use of" the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405.

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 LinuxGNU — GlibcRedhat — Enterprise LinuxRedhat — Enterprise Virtualization

CWE

Referencias

JSON original (NVD)

Mostrar
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          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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        "userInteractionRequired": false
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  "published": "2014-02-10T18:15:10.120",
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
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  ],
  "descriptions": [
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      "lang": "en",
      "value": "The vfprintf function in stdio-common/vfprintf.c in GNU C Library (aka glibc) 2.5, 2.12, and probably other versions does not \"properly restrict the use of\" the alloca function when allocating the SPECS array, which allows context-dependent attackers to bypass the FORTIFY_SOURCE format-string protection mechanism and cause a denial of service (crash) or possibly execute arbitrary code via a crafted format string using positional parameters and a large number of format specifiers, a different vulnerability than CVE-2012-3404 and CVE-2012-3405."
    },
    {
      "lang": "es",
      "value": "La función vfprintf en stdio-common/vfprintf.c en GNU C Library (también conocido como glibc) 2.5, 2.12 y probablemente otras versiones no \"restringe debidamente el uso de\" la función alloca cuando asigna el  array SPECS, lo que permite a atacantes dependientes de contexto evadir el mecanismo de protección de cadenas de formato FORTIFY_SOURCE y causar una denegación de servicio (caída) o posiblemente ejecutar código arbitrario a través de una cadena de formato manipulada mediante el uso de parámetros posicionales y un gran número de especificadores de formato, una vulnerabilidad diferente a CVE-2012-3404 y CVE-2012-3405."
    }
  ],
  "lastModified": "2026-06-16T23:43:09.570",
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