CVE-2018-0136

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Cisco Bug IDs: CSCvg46800."}, {"lang": "es", "value": "Una vulnerabilidad en el subsistema IPv6 de Cisco IOS XR Software Release 5.3.4 para Cisco Aggregation Services Router (ASR) 9000 Series podr\u00eda permitir que un atacante remoto no autenticado desencadene la recarga de una o m\u00e1s tarjetas de l\u00ednea Trident, lo que resulta en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). La vulnerabilidad se debe a la manipulaci\u00f3n incorrecta de paquetes IPv6 con una extensi\u00f3n de cabecera de fragmento. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes IPv6 dise\u00f1ados para provocar este problema en o a trav\u00e9s de la tarjeta de l\u00ednea Trident. Un exploit con \u00e9xito podr\u00eda permitir que el atacante desencadene la recarga de las tarjetas de l\u00ednea Trident, lo que resulta en un DoS durante el per\u00edodo de tiempo que la tarjeta necesita para reiniciarse. Esta vulnerabilidad afecta a Cisco Aggregation Services Router (ASR) 9000 Series cuando se cumplen las siguientes condiciones: el router ejecuta Cisco IOS XR Software Release 5.3.4 y tiene instaladas tarjetas de l\u00ednea Trident con IPv6 configurado. Se ha puesto en disposici\u00f3n de los usuarios una actuaci\u00f3n del mantenimiento de software (SMU) que aborda esta vulnerabilidad. La soluci\u00f3n tambi\u00e9n se ha incorporado en service pack 7 para Cisco IOS XR Software Release 5.3.4. 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