SmmExploit

SmmExploit Questa è una relazione e un exploit di CVE-2021-26943, la vulnerabilità di escalation dei privilegi locali da kernel a SMM nel BIOS versione 303 di ASUS UX360CA. Il problema è stato corretto nella versione 304. Descrizione del problema Sommario Il BIOS versione 303 di UX360CA ha 3 modu...

Multiple race conditions due to TOCTOU flaws in various UEFI Implementations

Overview Multiple Unified Extensible Firmware Interface UEFI implementations are vulnerable to code execution in System Management Mode SMM by an attacker who gains administrative privileges on the local machine. An attacker can corrupt the memory using Direct Memory Access DMA timing attacks tha...

System Management Mode deep dive: How SMM isolation hardens the platform

Ensuring that the platform firmware is healthy and trustworthy is fundamental to guaranteeing that powerful platform security features like Hypervisor-protected code integrity HVCI and Windows Defender Credential Guard are functioning as expected. Windows 10 achieves this by leveraging a...