CVE-2021-31356

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This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R3-S1-EVO; All versions of 21.1-EVO and 21.2-EVO."}, {"lang": "es", "value": "Una vulnerabilidad de inyecci\u00f3n de comandos en el procesamiento de comandos en Juniper Networks Junos OS Evolved permite a un atacante con acceso autenticado a la CLI ser capaz de omitir las protecciones de acceso configuradas para ejecutar comandos de shell arbitrarios dentro del contexto del usuario actual. La vulnerabilidad permite a un atacante omitir las restricciones de autorizaci\u00f3n de comandos asignadas a su cuenta de usuario espec\u00edfica y ejecutar comandos que est\u00e1n disponibles para el nivel de privilegio para el que el usuario est\u00e1 asignado. Por ejemplo, un usuario que est\u00e1 en la clase de inicio de sesi\u00f3n de superusuario, pero restringido a la ejecuci\u00f3n de comandos espec\u00edficos de la CLI podr\u00eda explotar la vulnerabilidad para ejecutar cualquier otro comando disponible para un usuario administrador sin restricciones. Esta vulnerabilidad no aumenta el nivel de privilegios del usuario, sino que omite cualquier restricci\u00f3n de comandos de la CLI al permitir el acceso completo al shell. Este problema afecta a Juniper Networks Junos OS Evolved: Todas las versiones anteriores a 20.4R3-S1-EVO; Todas las versiones de 21.1-EVO y 21.2-EVO"}], "id": "CVE-2021-31356", "lastModified": "2026-06-17T03:51:36.790", "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": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-10-19T19:15:08.897", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11221"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11221"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-78"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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