EFI: Do not import certificates from UEFI Secure Boot for T2 Macs
Summary
GSD-2022-1003242: efi: Do not import certificates from UEFI Secure Boot for T2 Macs. Affects Kernel versions < 65237307f88f5200782ae7f243bdd385e37cde5d. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system. It acts as a bridge between the hardware and software layers, providing essential functions and services for the system's operation. The EFI (Extensible Firmware Interface) is a specification that defines the interface between the operating system and the firmware on a computer. T2 Macs are Macintosh computers equipped with the Apple T2 security chip, which provides enhanced security features. One of these features is UEFI Secure Boot, which verifies the integrity of the firmware and operating system during boot. However, a vulnerability has been discovered in the EFI implementation that allows the importation of certificates from UEFI Secure Boot for T2 Macs, potentially compromising the security of the system.
Vulnerability Detail
The vulnerability arises from the improper handling of certificates from UEFI Secure Boot for T2 Macs in the EFI implementation. By importing these certificates, an attacker could potentially bypass the secure boot process and execute malicious code during system boot. This could lead to unauthorized access, data breaches, or the installation of malware or other malicious software. The impact of this vulnerability is significant, as it undermines the security measures provided by UEFI Secure Boot on T2 Macs. The vulnerability has been addressed in the Linux Kernel version v5.15.46 by commit 65237307f88f5200782ae7f243bdd385e37cde5d.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The EFI vulnerability in the Linux Kernel, which allows the importation of certificates from UEFI Secure Boot for T2 Macs, poses a significant security risk. It is crucial to update the Linux Kernel to version v5.15.46 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows an attacker to bypass the secure boot process on T2 Macs, potentially leading to unauthorized access, data breaches, or the installation of malware.
The vulnerability can be fixed by updating the Linux Kernel to version v5.15.46 or later.
No specific workaround has been mentioned for this vulnerability.
The vulnerability affects T2 Macs running Linux Kernel versions prior to v5.15.46.
More information about this vulnerability can be found in the references link provided in the vulnerability details.
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