CVE-2019-1721

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An attacker could exploit this vulnerability by sending a Session Initiation Protocol (SIP) message with a crafted XML payload to an affected device. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition. Manual intervention may be required to recover the device. This vulnerability is fixed in Cisco Expressway Series and Cisco TelePresence Video Communication Server Releases X12.5.1 and later."}, {"lang": "es", "value": "Una vulnerabilidad en la funci\u00f3n phone book de Expressway Series y TelePresence Video Communication Server (VCS) de Cisco podr\u00eda permitir que un atacante remoto autorizado haga que la CPU aumente al 100% de utilizaci\u00f3n, lo que causa una condici\u00f3n de denegaci\u00f3n de servicio (DoS) en un sistema afectado. La vulnerabilidad es debido a un manejo inadecuado de la entrada XML. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando un mensaje de Protocolo de Inicio de Sesi\u00f3n (SIP) con una carga XML creada a un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitirle al atacante agotar los recursos de la CPU, lo que resultar\u00eda en una condici\u00f3n DoS. Puede requerirse intervenci\u00f3n manual para recuperar el dispositivo. Esta vulnerabilidad se corrigi\u00f3 en las versiones de Expressway Series y TelePresence Video Communication Server de Cisco X12.5.1 y posteriores."}], "id": "CVE-2019-1721", "lastModified": "2026-06-17T02:29:07.610", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 6.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "psirt@cisco.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2019-1721", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-21T18:59:33.225118Z", "version": "2.0.3"}}]}, "published": "2019-04-18T01:29:01.967", "references": [{"source": "psirt@cisco.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/108016"}, {"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-es-tvcs-dos"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/108016"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-es-tvcs-dos"}], "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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