Driver Image Handle(驱动程序映像句柄):具有映像句柄和驱动程序句柄的属性。用于加载到内存中的UEFI驱动程序镜像的句柄。支持Loaded Image Protocol,同时支持UEFI驱动程序相关的协议。 Agent Handle(代理句柄):UEFI规范中的一些与UEFI驱动程序模型相关的服务使用此术语。代理是一个可以消耗处理句柄数据库中协议的UEFI组件。
ESET researchers are the first to publish an analysis of BlackLotus, the first in-the-wild UEFI bootkit capable of bypassing UEFI Secure Boot.
Next up is the DXE (Driver eXecution Environment) phase. Before entering DXE, PEI must perform two important tasks. The first is to verify the DXE. In our Intel parlance, PEI (or at least the part of it responsible for trust) was part of the IBB that was verified by the Boot Guard ...
Turning on a computer kick-starts a chain of events that occurs before the OS is loaded. Firmware rouses the computer's subsystem to execute a series of tests and locates the boot loader, which, in turn, starts the OS kernel. This entire process can be done by either BIOS or UEFI. In...
Was this reply helpful? Yes No Paul_Tikkanen 173,021 42,658 27,850 Level 22 05-05-2023 10:13 AM You're very welcome, Nick. Unfortunately, I do not, That is because no drivers are loaded outside of Windows other than a standard VGA driver and in...
(e.g. fails to boot things unsigned by the db key, but does boot things signed with it). Also able to see the keys with KeyTool. Even the kernel boot process sees the key and the rest of the efivars fs is properly loaded, however efi-readvar reports “no entries” for all secure...
Contains the EDID information that was retrieved from the video output device. This information may differ from the EDID Active Protocol since the EDID Active Protocol will take into account any interaction with the EDID Override Protocol that was consumed by this driver. The EDID Discovered ...
The serial console entry was removed for aarch64 indrop tty for aarch64 and specify firmware in kola ignition failure testcoreos-assembler#1748 The problem is that some aarch64 systems usettyS0and some usettyAMA0so it's hard to be consistent and generally useful. ...
This includes downloading and executing a kernel driver, DLL, or a regular executable; fetching bootkit updates, and even uninstalling the bootkit from the infected system. "Many critical vulnerabilities affecting security of UEFI systems have been discovered in the last few years," Smolár said. ...
including I/O device firmware and operating system loaders. When enabled, UEFI Secure Boot prevents unsigned or compromised UEFI device drivers from being loaded, displays an error message, and does not allow the device to function. You must disable Secure Boo...