CVE-2020-3479

{"id": "CVE-2020-3479", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 1.6}]}, "published": "2020-09-24T18:15:20.010", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-bgp-evpn-dos-LNfYJxfF", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-400"}]}, {"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the implementation of Multiprotocol Border Gateway Protocol (MP-BGP) for the Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) address family in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of Border Gateway Protocol (BGP) update messages that contain crafted EVPN attributes. An attacker could exploit this vulnerability by sending BGP update messages with specific, malformed attributes to an affected device. A successful exploit could allow the attacker to cause an affected device to crash, resulting in a DoS condition."}, {"lang": "es", "value": "Una vulnerabilidad en la implementaci\u00f3n de Multiprotocol Border Gateway Protocol (MP-BGP) para la familia de direcciones Layer 2 VPN (L2VPN) Ethernet VPN (EVPN) en Cisco IOS Software y Cisco IOS XE Software, podr\u00eda permitir a un atacante remoto no autenticado causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS). La vulnerabilidad es debido al procesamiento incorrecto de los mensajes de actualizaci\u00f3n del Border Gateway Protocol (BGP) que contienen atributos EVPN dise\u00f1ados. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo mensajes de actualizaci\u00f3n de BGP con atributos espec\u00edficos malformado hacia un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar el bloqueo de un dispositivo afectado, resultando en una condici\u00f3n de DoS."}], "lastModified": "2023-11-07T03:22:47.037", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B6230A85-30D2-4934-A8A0-11499B7B09F8"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B7D95E8A-8F0B-44E5-B266-09E10BAAEC55"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:cisco:1100_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "1952B64C-4AE0-4CCB-86C5-8D1FF6A12822"}, {"criteria": "cpe:2.3:h:cisco:1101_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "5EB8A757-7888-4AC2-BE44-B89DB83C6C77"}, {"criteria": "cpe:2.3:h:cisco:1109_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "B80890A8-E3D3-462C-B125-9E9BC6525B02"}, {"criteria": "cpe:2.3:h:cisco:1111x_integrated_services_router:-:*:*:*:*:*:*:*", "vulnerable": 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