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CVE-2012-6711

Estado: ModificadaAlta (7.8)—

A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the "echo -e" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv().

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)

GNU — BashRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2012-6711",
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  "published": "2019-06-18T18:15:09.247",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-119"
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  "descriptions": [
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      "lang": "en",
      "value": "A heap-based buffer overflow exists in GNU Bash before 4.3 when wide characters, not supported by the current locale set in the LC_CTYPE environment variable, are printed through the echo built-in function. A local attacker, who can provide data to print through the \"echo -e\" built-in function, may use this flaw to crash a script or execute code with the privileges of the bash process. This occurs because ansicstr() in lib/sh/strtrans.c mishandles u32cconv()."
    },
    {
      "lang": "es",
      "value": "Existe un desbordamiento de búfer basado en el heap en GNU Bash antes de 4.3 cuando los caracteres anchos, no admitidos por la configuración regional actual establecida en la variable de entorno LC_CTYPE, se imprimen a través de la función incorporada de eco. Un atacante local, que puede proporcionar datos para imprimir a través de la función incorporada \"echo -e\", puede usar esta falla para bloquear un script o ejecutar código con los privilegios del proceso de bash. Esto ocurre porque ansicstr () en lib / sh / strtrans.c mishandles u32cconv ()."
    }
  ],
  "lastModified": "2026-06-16T23:48:39.277",
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}