CVE-2021-1398

A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device. This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device. This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

Una vulnerabilidad en la lógica de arranque del Software Cisco IOS XE, podría permitir a un atacante local autenticado con privilegios de nivel 15 o un atacante no autenticado con acceso físico ejecutar código arbitrario en el sistema operativo Linux subyacente de un dispositivo afectado. Esta vulnerabilidad es debido a comprobaciones incorrectas de argumentos de funciones específicas que se pasan al script de arranque. Un atacante podría explotar esta vulnerabilidad al manipular un archivo específico, que un dispositivo afectado procesaría durante el proceso de arranque inicial. En los sistemas que están protegidos por la función de arranque seguro de la Unified Extensible Firmware Interface (UEFI), Una explotación con éxito podría permitir al atacante ejecutar código sin firmar en el momento del arranque y omitir la comprobación de la imagen en el proceso de arranque seguro del dispositivo afectado