2023-04-24 12:24:31 +02:00
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2024-11-23 15:12:23 +00:00
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"value" : "A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the \"virt_ext\" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape."
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"value" : "Se ha encontrado un fallo en el c\u00f3digo AMD de KVM para soportar la virtualizaci\u00f3n anidada SVM. El fallo es producido cuando es procesado el VMCB (bloque de control de la m\u00e1quina virtual) proporcionado por el hu\u00e9sped L1 para generar/manejar un hu\u00e9sped anidado (L2). Debido a que no es comprobado apropiadamente el campo \"virt_ext\", este problema podr\u00eda permitir a un L1 malicioso deshabilitar tanto las intercepciones VMLOAD/VMSAVE como el VLS (Virtual VMLOAD/VMSAVE) para el hu\u00e9sped L2. Como resultado, el invitado L2 podr\u00eda leer/escribir p\u00e1ginas f\u00edsicas del anfitri\u00f3n, resultando en un bloqueo de todo el sistema, un filtrado de datos confidenciales o un potencial escape del invitado al anfitri\u00f3n"
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