CVE-2019-1910

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{"affected": [{"affectedData": [{"product": "Cisco IOS XR Software", "vendor": "Cisco", "versions": [{"lessThan": "6.6.3", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "psirt@cisco.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "matchCriteriaId": "3B76CC85-2825-44F1-BE8A-3F01573BC199", "versionEndExcluding": "6.6.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:cisco:carrier_routing_system:7.0.1:*:*:*:*:*:*:*", "matchCriteriaId": "0B8E0412-1349-46E6-9F90-D5800B7258F4", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the implementation of the Intermediate System&ndash;to&ndash;Intermediate System (IS&ndash;IS) routing protocol functionality in Cisco IOS XR Software could allow an unauthenticated attacker who is in the same IS&ndash;IS area to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of crafted IS&ndash;IS link-state protocol data units (PDUs). An attacker could exploit this vulnerability by sending a crafted link-state PDU to an affected system to be processed. A successful exploit could allow the attacker to cause all routers within the IS&ndash;IS area to unexpectedly restart the IS&ndash;IS process, resulting in a DoS condition. This vulnerability affects Cisco devices if they are running a vulnerable release of Cisco IOS XR Software earlier than Release 6.6.3 and are configured with the IS\u2013IS routing protocol. Cisco has confirmed that this vulnerability affects both Cisco IOS XR 32-bit Software and Cisco IOS XR 64-bit Software."}, {"lang": "es", "value": "Una vulnerabilidad en la implementaci\u00f3n de la funcionalidad del protocolo de enrutamiento intermedio en System\u2013to\u2013Intermediate La funcionalidad del protocolo del router en el software Cisco IOS XR podr\u00eda permitir que un atacante no autenticado que se encuentre en la misma \u00e1rea cause una condici\u00f3n de denegaci\u00f3n de servicio (DoS). . La vulnerabilidad se debe al procesamiento incorrecto de las unidades de datos de protocolo de estado de enlace (PDU) de IS\u2013IS link-state. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando una PDU de estado de enlace especialmente dise\u00f1ada a un sistema afectado para su procesamiento. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir que el atacante provoque todos los routers dentro del el \u00e1rea IS\u2013IS para reiniciar inesperadamente el proceso IS\u2013IS lo que resulta en una condici\u00f3n DoS. Esta vulnerabilidad afecta a los dispositivos Cisco si est\u00e1n ejecutando una versi\u00f3n vulnerable del software Cisco IOS XR anterior a la versi\u00f3n 6.6.3 y est\u00e1n configurados con el protocolo de enrutamiento IS-IS. Cisco ha confirmado que esta vulnerabilidad afecta tanto al software Cisco IOS XR de 32 bits como al software Cisco IOS XR de 64 bits."}], "id": "CVE-2019-1910", "lastModified": "2026-06-17T02:29:35.253", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 6.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2019-1910", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-21T18:57:40.380427Z", "version": "2.0.3"}}]}, "published": "2019-08-07T21:15:11.363", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1910"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-iosxr-isis-dos-1910"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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