CVE-2022-40261

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Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: OverClockSmiHandler SHA256: a204699576e1a48ce915d9d9423380c8e4c197003baf9d17e6504f0265f3039c Module GUID: 4698C2BD-A903-410E-AD1F-5EEF3A1AE422"}, {"lang": "es", "value": "Un atacante puede explotar esta vulnerabilidad para elevar los privilegios del anillo 0 al anillo -2, ejecutar c\u00f3digo arbitrario en el Modo de Administraci\u00f3n del Sistema - un entorno m\u00e1s privilegiado que el sistema operativo (SO) y completamente aislado de \u00e9l. La ejecuci\u00f3n de c\u00f3digo arbitrario en el SMM tambi\u00e9n evita las protecciones de la flash SPI basadas en el SMM contra las modificaciones, lo que puede ayudar a un atacante a instalar una puerta trasera/implante de firmware en la BIOS. Este c\u00f3digo de firmware malicioso en la BIOS podr\u00eda persistir a trav\u00e9s de las reinstalaciones del sistema operativo. Adem\u00e1s, esta vulnerabilidad podr\u00eda ser usada por actores maliciosos para omitir los mecanismos de seguridad proporcionados por el firmware UEFI (por ejemplo, Secure Boot y algunos tipos de aislamiento de memoria para hipervisores). 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