An ESET researcher recently identified a critical vulnerability in the UEFI Secure Boot mechanism, designated as CVE-2024-7344. The affected application originates from Microsoft Corporation. UEFI Secure Boot, a vital security feature, leverages signature keys and hashes to validate binaries against the DB (allowed list) and DBX (denied list) during the boot process.
This vulnerability poses a serious threat, allowing attackers to bypass Secure Boot's integrity checks entirely by using a custom PE loader. Fortunately, there have been no reported real-world exploits of this flaw. However, if successfully exploited, it could grant attackers persistent access, render them invisible to operating system-level security tools, and enable privilege escalation.
Microsoft addressed this vulnerability with a patch released on January 14, 2025. To safeguard your systems, it’s critical to update your Windows and Linux devices promptly.
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