A flaw was found in New Horizon Datasys bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to load and execute arbitrary code in the pre-boot stage, an attacker simply needs to replace the existing signed bootloader currently in use with this bootloader. Access to the EFI System Partition is required for booting using external media.
CERT/CC: CVE-2022-34302 New Horizon Data Systems Inc Boot Loader Bypass
Signed third party UEFI bootloaders are vulnerable to Secure Boot bypass
Researchers Uncover UEFI Secure Boot Bypass in 3 Microsoft Signed Boot Loaders
Introducing Qualys Threat Research Thursdays
August 2022 Patch Tuesday | Microsoft Releases 121 Vulnerabilities with 17 Critical, plus 20 Microsoft Edge (Chromium-Based); Adobe Releases 5 Advisories, 25 Vulnerabilities with 15 Critical.
Microsoft Patch Tuesday August 2022: DogWalk, Exchange EOPs, 13 potentially dangerous, 2 funny, 3 mysterious vulnerabilities
KB5016616: Windows 10 Version 20H2 / 21H1 / 21H2 Security Update (August 2022)
Patch Tuesday - August 2022