CVE-2021-1256

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The attacker would need valid user credentials on the device."}, {"lang": "es", "value": "Una vulnerabilidad en la CLI del software Cisco Firepower Threat Defense (FTD), podr\u00eda permitir a un atacante autenticado local sobrescribir archivos en el sistema de archivos de un dispositivo afectado mediante el uso de t\u00e9cnicas de salto de directorios. Una explotaci\u00f3n con \u00e9xito podr\u00eda causar inestabilidad en el sistema si archivos importantes del sistema son sobrescritos. Esta vulnerabilidad es debido a una comprobaci\u00f3n insuficiente de entrada del usuario para la ruta del archivo en un comando CLI espec\u00edfico. Un atacante podr\u00eda explotar esta vulnerabilidad al iniciar sesi\u00f3n en un dispositivo de destino y emitir un comando CLI espec\u00edfico con la entrada del usuario. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante sobrescribir archivos arbitrarios en el sistema de archivos del dispositivo afectado. El atacante necesitar\u00eda credenciales de usuario v\u00e1lidas en el dispositivo"}], "id": "CVE-2021-1256", "lastModified": "2026-08-11T19:37:30.880", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 3.6, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.2, "source": "psirt@cisco.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-1256", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-08T20:45:16.197162Z", "version": "2.0.3"}}]}, "published": "2021-04-29T18:15:08.840", "references": [{"source": "psirt@cisco.com", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10382"}, {"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-overwrite-XknRjGdB"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Not Applicable", "Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10382"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-overwrite-XknRjGdB"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-552"}], "source": "psirt@cisco.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-552"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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