![]() ![]() AMI has released updates to mitigate the potential vulnerability.Ī potential Time-of-Check to Time-of-Use (TOCTOU) vulnerability has been identified in certain HP PC products using AMI UEFI Firmware (system BIOS) which might allow arbitrary code execution, denial of service, and information disclosure. Exploitation of this vulnerability could potentially lead to denial of service for the platform.Ī potential Time-of-Check to Time-of-Use (TOCTOU) vulnerability has been identified in certain HP PC products using AMI UEFI Firmware (system BIOS), which might allow arbitrary code execution. On some systems, this variable can be overwritten using operating system APIs. ![]() UEFI implementations do not correctly protect and validate information contained in the 'MeSetup' UEFI variable. A local authenticated malicious user with administrator privileges may potentially exploit this vulnerability in order to modify a UEFI variableĪn issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. A local authenticated malicious user with administrator privileges may potentially exploit this vulnerability in order to modify a UEFI variable.ĭell BIOS contains an improper input validation vulnerability. A malicious user with physical access to the system may potentially exploit this vulnerability in order to modify a security-critical UEFI variable without knowledge of the BIOS administrator.ĭell BIOS contains an improper input validation vulnerability. Expert users who have a copy of their data may, as a workaround, re-encrypt the LUKS partition(s) themselves.ĭell BIOS contains an improper authentication vulnerability. ![]() A patch is available and anticipated to be part of version 0.3.13 to backport to NixOS 22.11, 23.05, and unstable channels. Users of calamares-nixos-extensions version 0.3.12 and prior who installed NixOS through the graphical calamares installer, with an unencrypted `/boot`, on either non-UEFI systems or with a LUKS partition different from `/` have their LUKS key file in `/boot` as a plaintext CPIO archive attached to their NixOS initrd. The only way to prevent the issue with an unpatched EFI Boot Guard version is to avoid accesses to user variables, specifically modifications to them.Ĭalamares-nixos-extensions provides Calamares branding and modules for NixOS, a distribution of GNU/Linux. ![]() An update of the bootloader EFI executable is not required. Its library and tools should be updated, so should programs statically linked against it. EFI Boot Guard release v0.15 contains required patches to sanitize and validate the bootloader environment prior to processing it in userspace. Not affected by this issue is EFI Boot Guard's bootloader EFI binary. Furthermore, `bg_printenv` may crash over invalid read accesses or report invalid results. This is triggered when the affected components try to modify a manipulated environment, in particular its user variables. Insufficient or missing validation and sanitization of input from untrustworthy bootloader environment files can cause crashes and probably also code injections into `bg_setenv`) or programs using `libebgenv`. Efibootguard is a simple UEFI boot loader with support for safely switching between current and updated partition sets. ![]()
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