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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the access control list (ACL) processing on MPLS interfaces in the ingress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL.\r\n\r This vulnerability is due to improper assignment of lookup keys to internal interface contexts. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access resources behind the affected device that were supposed to be protected by a configured ACL."}, {"lang": "es", "value": "Una vulnerabilidad en el procesamiento de la lista de control de acceso (ACL) en las interfaces MPLS en la direcci\u00f3n de ingreso del software Cisco IOS XR podr\u00eda permitir que un atacante remoto no autenticado omita una ACL configurada. Esta vulnerabilidad se debe a una asignaci\u00f3n incorrecta de claves de b\u00fasqueda a contextos de interfaz interna. Un atacante podr\u00eda aprovechar esta vulnerabilidad intentando enviar tr\u00e1fico a trav\u00e9s de un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante acceder a recursos detr\u00e1s del dispositivo afectado que se supon\u00eda estaban protegidos por una ACL configurada."}], "id": "CVE-2024-20315", "lastModified": "2026-04-15T00:35:42.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "psirt@cisco.com", "type": "Secondary"}]}, "published": "2024-03-13T17:15:47.607", "references": [{"source": "psirt@cisco.com", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-acl-bypass-RZU5NL3e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-acl-bypass-RZU5NL3e"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

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