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CVE-2021-43396

Estado: ModificadaAlta (7.5)—

In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.

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 (7)

GNU — GlibcOracle — Communications Cloud Native Core Binding Support FunctionOracle — Communications Cloud Native Core Network Function Cloud Native EnvironmentOracle — Communications Cloud Native Core Network Repository FunctionOracle — Communications Cloud Native Core Security Edge Protection ProxyOracle — Communications Cloud Native Core Unified Data RepositoryOracle — Enterprise Operations Monitor

CWE

Referencias

JSON original (NVD)

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      "value": "In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states \"the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug."
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      "lang": "es",
      "value": "** EN DISPUTA ** En el archivo iconvdata/iso-2022-jp-3.c de la Biblioteca C de GNU (también conocida como glibc) 2.34, los atacantes remotos pueden forzar a iconv() a emitir un carácter espurio '\\0' a través de datos ISO-2022-JP-3 manipulados que van acompañados de un reinicio de estado interno. Esto puede afectar a la integridad de los datos en ciertos casos de uso de iconv(). NOTA: el proveedor afirma que \"el fallo no puede ser invocado a través de la entrada del usuario y requiere que iconv sea invocado con un inbuf NULL, lo que debería requerir un fallo de aplicación separado para hacerlo involuntariamente. Por lo tanto, el fallo no tiene impacto en la seguridad\"."
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  "lastModified": "2026-06-17T04:10:54.743",
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