Yinqian Zhang

A potential power side-channel issue in some AMD processors may allow an authenticated attacker to use the power reporting functionality to monitor a program’s execution inside an AMD SEV VM, potentially resulting in a leak of sensitive information.

O problema está relacionado à implementação do mecanismo de proteção SEV-SNP (Secure Nested Paging) para máquinas virtuais em execução em servidores com processadores AMD, o que está associado a erros de criptografia de dados. Um invasor com acesso a um hipervisor malicioso pode ser capaz de inferir valores de dados usados em um convidado SEV em CPUs AMD, monitorando valores de texto cifrado ao longo do tempo.

O problema está relacionado a uma vulnerabilidade de divulgação de informações nas tecnologias Secure Encrypted Virtualization with Encrypted State (SEV-ES) e Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP) dos processadores AMD EPYC. Um invasor local autenticado poderia potencialmente explorar essa vulnerabilidade, levando ao vazamento de dados do convidado por um hipervisor malicioso.

Name of the Vulnerable Software and Affected Versions: iOS versions prior to 11 macOS versions prior to 10.13 tvOS versions prior to 11 watchOS versions prior to 4 Description: The issue involves the Kernel component and allows attackers to obtain sensitive network-activity information about arbitrary apps via a crafted app. Recommendations: For iOS versions prior to 11, update to version 11 or later. For macOS versions prior to 10.13, update to version 10.13 or later. For tvOS versions prior to 11, update to version 11 or later. For watchOS versions prior to 4, update to version 4 or later.

Name of the Vulnerable Software and Affected Versions: iOS versions prior to 11 Description: An issue in certain Apple products involves the `Sandbox Profiles` component, allowing attackers to determine whether arbitrary files exist via a crafted app. Recommendations: For iOS versions prior to 11, update to a version 11 or later to resolve the issue.

The issue involves the Kernel component and allows attackers to monitor arbitrary apps via a crafted app that accesses process information at a high rate.