CVE-2019-1686

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The vulnerability is due to incorrect processing of the ACL applied to an interface of an affected device when Cisco Express Forwarding load balancing using the 3-tuple hash algorithm is enabled. An attacker could exploit this vulnerability by sending traffic through an affected device that should otherwise be denied by the configured ACL. An exploit could allow the attacker to bypass protection offered by a configured ACL on the affected device. There are workarounds that address this vulnerability. Affected Cisco IOS XR versions are: Cisco IOS XR Software Release 5.1.1 and later till first fixed. First Fixed Releases: 6.5.2 and later, 6.6.1 and later."}, {"lang": "es", "value": "Una vulnerabilidad en el indicador funci\u00f3n de inspecci\u00f3n de marcas TCP para listas de control de acceso (ACL) en ASR 9000 Series Aggregation Services de Cisco versi\u00f3n ASR 9000 Series podr\u00eda permitir que un atacante remoto no identificado omita la protecci\u00f3n ofrecida por una ACL configurada en un dispositivo afectado. La vulnerabilidad se debe a un procesamiento incorrecto de la ACL aplicada a una interfaz de un dispositivo afectado cuando se habilita el equilibrio de carga de Cisco Express Forwarding utilizando el algoritmo de hash de 3 tuplas. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando tr\u00e1fico por medio de un dispositivo afectado que, de lo contrario, deber\u00eda ser rechazado por la ACL configurada. Una operaci\u00f3n podr\u00eda permitir al atacante omitir la protecci\u00f3n ofrecida por una ACL configurada en el dispositivo afectado. Hay soluciones que abordan esta vulnerabilidad. Las versiones afectadas de Cisco IOS XR son: Cisco IOS XR Software Release versi\u00f3n 5.1.1 y posteriores hasta su primera reparaci\u00f3n. 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