Show plain JSON{"id": "CVE-2021-34767", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.3, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 6.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.8}]}, "published": "2021-09-23T03:15:20.180", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-ipv6-dos-NMYeCnZv", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-ipv6-dos-NMYeCnZv", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-670"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-670"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in IPv6 traffic processing of Cisco IOS XE Wireless Controller Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, adjacent attacker to cause a Layer 2 (L2) loop in a configured VLAN, resulting in a denial of service (DoS) condition for that VLAN. The vulnerability is due to a logic error when processing specific link-local IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that would flow inbound through the wired interface of an affected device. A successful exploit could allow the attacker to cause traffic drops in the affected VLAN, thus triggering the DoS condition."}, {"lang": "es", "value": "Una vulnerabilidad en el procesamiento del tr\u00e1fico IPv6 de Cisco IOS XE Wireless Controller Software para Cisco Catalyst 9000 Family Wireless Controllers podr\u00eda permitir a un atacante adyacente no autenticado causar un bucle de capa 2 (L2) en una VLAN configurada, resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS) para esa VLAN. La vulnerabilidad es debido a un error l\u00f3gico cuando se procesa tr\u00e1fico IPv6 local de enlace espec\u00edfico. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de un paquete IPv6 dise\u00f1ado que fluyera hacia adentro mediante la interfaz cableada de un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar ca\u00eddas de tr\u00e1fico en la VLAN afectada, desencadenando as\u00ed una condici\u00f3n de DoS"}], "lastModified": "2024-11-21T06:11:09.273", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F73E7874-A063-4AE5-9F0A-53D590B7B99B"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4BF22C29-84DF-44CA-B574-FE04AB39E344"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C2C7C0BA-D618-4B65-B42C-43393167EEE0"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "623BF701-ADC9-4F24-93C5-043A6A7FEF5F"}, {"criteria": "cpe:2.3:o:cisco:ios_xe:16.7.1a:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E5311FBE-12BF-41AC-B8C6-D86007834863"}, {"criteria": 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