cve-2022-24903
Vulnerability from cvelistv5
Published
2022-05-05 00:00
Modified
2024-08-03 04:29
Summary
Buffer overflow in TCP syslog server (receiver) components in rsyslog
Impacted products
rsyslogrsyslog
Show details on NVD website


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            "url": "https://github.com/rsyslog/rsyslog/security/advisories/GHSA-ggw7-xr6h-mmr8"
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMNNXLCU2UORRVSZO24HL4KMVPK5PHVW/"
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            "url": "https://security.netapp.com/advisory/ntap-20221111-0002/"
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      "source": {
        "advisory": "GHSA-ggw7-xr6h-mmr8",
        "discovery": "UNKNOWN"
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      "title": "Buffer overflow in TCP syslog server (receiver) components in rsyslog"
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    "cveId": "CVE-2022-24903",
    "datePublished": "2022-05-05T00:00:00",
    "dateReserved": "2022-02-10T00:00:00",
    "dateUpdated": "2024-08-03T04:29:01.617Z",
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Los m\u00f3dulos para la recepci\u00f3n de syslogs por TCP presentan un potencial desbordamiento del buffer de pila cuando es usado el framing de conteo de octetos. Esto puede resultar en un segfault o alg\u00fan otro mal funcionamiento. A nuestro entender, esta vulnerabilidad no puede ser usada para una ejecuci\u00f3n de c\u00f3digo remota. Pero todav\u00eda puede haber una peque\u00f1a posibilidad de que los expertos lo hagan. El fallo es producido cuando es le\u00eddo el recuento de octetos. Mientras se presenta una comprobaci\u00f3n del n\u00famero m\u00e1ximo de octetos, los d\u00edgitos son escritos en un b\u00fafer de mont\u00f3n incluso cuando el recuento de octetos supera el m\u00e1ximo, lo que puede usarse para sobrepasar el b\u00fafer de memoria. Sin embargo, una vez que la secuencia de d\u00edgitos es detenida, no pueden a\u00f1adirse m\u00e1s caracteres al b\u00fafer. En nuestra opini\u00f3n, esto hace que las explotaciones remotas sean imposibles o, al menos, muy complejos. El encuadre de octetos es uno de los dos modos de encuadre posibles. Es relativamente infrecuente, pero est\u00e1 habilitado por defecto en los receptores. Los m\u00f3dulos \\\"imtcp\\\", \\\"imptcp\\\", \\\"imgssapi\\\" y \\\"imhttp\\\" son usados para la recepci\u00f3n regular de mensajes syslog. Es una buena pr\u00e1ctica no exponerlos directamente al p\u00fablico. Cuando es seguida esta pr\u00e1ctica, el riesgo es considerablemente menor. El m\u00f3dulo \\\"imdiag\\\" es un m\u00f3dulo de diagn\u00f3stico destinado principalmente a las ejecuciones de los bancos de pruebas. No esperamos que est\u00e9 presente en ninguna instalaci\u00f3n de producci\u00f3n. El framing de octetos no es muy com\u00fan. Normalmente, es necesario habilitarlo espec\u00edficamente en los remitentes. Si los usuarios no lo necesitan, pueden deshabilitarlo para los m\u00f3dulos m\u00e1s importantes. 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  }
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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