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authenticated, local attacker with high privileges to bypass the Cisco Secure Boot functionality and load unverified software on an affected device. To exploit this successfully, the attacker must have root-system privileges on the affected device.\r\n\r This vulnerability is due to an error in the software build process. An attacker could exploit this vulnerability by manipulating the system’s configuration options to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass of the requirement to run Cisco signed images or alter the security properties of the running system."}, {"lang": "es", "value": "Una vulnerabilidad en el proceso de arranque del software Cisco IOS XR podr\u00eda permitir que un atacante local autenticado con altos privilegios omita la funcionalidad de arranque seguro de Cisco y cargue software no verificado en un dispositivo afectado. Para aprovechar esto con \u00e9xito, el atacante debe tener privilegios de system root en el dispositivo afectado. Esta vulnerabilidad se debe a un error en el proceso de compilaci\u00f3n del software. Un atacante podr\u00eda aprovechar esta vulnerabilidad manipulando las opciones de configuraci\u00f3n del sistema para omitir algunas de las comprobaciones de integridad que se realizan durante el proceso de arranque. Un exploit exitoso podr\u00eda permitir al atacante controlar la configuraci\u00f3n de arranque, lo que podr\u00eda permitirle eludir el requisito de ejecutar im\u00e1genes firmadas de Cisco o alterar las propiedades de seguridad del sistema en ejecuci\u00f3n."}], "id": "CVE-2024-20456", "lastModified": "2025-08-04T17:44:16.417", "metrics": {"cvssMetricV31": [{"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": "psirt@cisco.com", "type": "Secondary"}]}, "published": "2024-07-10T16:15:03.703", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-secure-boot-quD5g8Ap"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-secure-boot-quD5g8Ap"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-732"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

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