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Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante provocar errores en el procesador de red, lo que resultar\u00eda en el reinicio o apagado del proceso de red. El tr\u00e1fico a trav\u00e9s de esa tarjeta de l\u00ednea se perder\u00eda mientras esta se recarga. Nota: Esta vulnerabilidad se ha observado principalmente en entornos VPN de Capa 2 (L2VPN) donde se ha aplicado una ACL IPv4 o una pol\u00edtica de QoS a la interfaz virtual del puente. Las configuraciones de Capa 3 donde la interfaz tiene aplicada una ACL IPv4 o una pol\u00edtica de QoS tambi\u00e9n se ven afectadas, aunque no se ha observado la vulnerabilidad."}], "id": "CVE-2025-20142", "lastModified": "2025-08-01T18:40:27.280", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Primary"}]}, "published": "2025-03-12T16:15:21.573", "references": [{"source": "psirt@cisco.com", "tags": ["Technical Description"], "url": "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/"}, {"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv4uni-LfM3cfBu"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "psirt@cisco.com", "type": "Primary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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