{"id": "CVE-2021-34793", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/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": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 3.9}, {"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 3.9}]}, "published": "2021-10-27T19:15:08.563", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-dos-JxYWMJyL", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-924"}]}, {"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-924"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption."}, {"lang": "es", "value": "Una vulnerabilidad en el Normalizador TCP del software Cisco Adaptive Security Appliance (ASA) y del software Firepower Threat Defense (FTD) que funciona en modo transparente podr\u00eda permitir a un atacante remoto no autenticado envenenar las tablas de direcciones MAC, lo que provocar\u00eda una vulnerabilidad de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad es debido al manejo incorrecto de determinados segmentos TCP cuando el dispositivo afectado est\u00e1 operando en modo transparente. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de un segmento TCP dise\u00f1ado mediante un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante envenenar las tablas de direcciones MAC en los dispositivos adyacentes, resultando en una interrupci\u00f3n de la red"}], "lastModified": "2023-11-07T03:36:26.283", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8C7F329B-4EF5-411A-9AB6-02E6A4162D6D", "versionEndExcluding": "9.8.4.40"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5429F29E-BEE8-4989-B5F3-A9BABBF64D31", "versionEndExcluding": "6.4.0.13"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "18589C74-19D2-44F0-AF26-68910E26655D", "versionEndExcluding": "6.6.5", "versionStartIncluding": "6.5.0"}, {"criteria": "cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*", "vulnerable": true, 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