CVE-2021-1390

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attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker would need to have valid user credentials at privilege level 15. This vulnerability exists because the affected software permits modification of the run-time memory of an affected device under specific circumstances. An attacker could exploit this vulnerability by authenticating to the affected device and issuing a specific diagnostic test command at the CLI. A successful exploit could trigger a logic error in the code that was designed to restrict run-time memory modifications. The attacker could take advantage of this logic error to overwrite system memory locations and execute arbitrary code on the underlying Linux operating system (OS) of the affected device."}, {"lang": "es", "value": "Una vulnerabilidad en uno de los comandos de CLI de prueba de diagn\u00f3stico del Software Cisco IOS XE, podr\u00eda permitir a un atacante local autenticado ejecutar c\u00f3digo arbitrario en un dispositivo afectado. Para explotar esta vulnerabilidad, el atacante necesitar\u00eda tener credenciales de usuario v\u00e1lidas en el nivel de privilegio 15. Esta vulnerabilidad se presenta porque el software afectado permite la modificaci\u00f3n de la memoria de tiempo de ejecuci\u00f3n de un dispositivo afectado en circunstancias espec\u00edficas. Un atacante podr\u00eda explotar esta vulnerabilidad al autenticarse en el dispositivo afectado y emitir un comando de prueba de diagn\u00f3stico espec\u00edfico en la CLI. Una explotaci\u00f3n con \u00e9xito podr\u00eda desencadenar un error l\u00f3gico en el c\u00f3digo que fue dise\u00f1ado para restringir las modificaciones de la memoria de tiempo de ejecuci\u00f3n. El atacante podr\u00eda aprovechar este error l\u00f3gico para sobrescribir las ubicaciones de la memoria del sistema y ejecutar c\u00f3digo arbitrario en el sistema operativo (OS) subyacente de Linux del dispositivo afectado"}], "id": "CVE-2021-1390", "lastModified": "2026-06-17T03:31:39.847", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 4.2, "source": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-1390", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-08T20:47:35.006300Z", "version": "2.0.3"}}]}, "published": "2021-03-24T20:15:13.917", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-OFP-6Nezgn7b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-OFP-6Nezgn7b"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-123"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

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