A new security vulnerability in UEFI affects millions of PCs

Security updates for operating systems and hardware have become more important than ever, while new vulnerabilities are discovered every day. Recently, a new security vulnerability was discovered in UEFI affecting millions of PCs worldwide.

Named LogoFAIL, this vulnerability was discovered by computer security researchers and presented at the "Black Hat Security Conference", in London. This indicates a problem with the Unified Extensible Firmware Interface (UEFI), the software component responsible for booting most operating system computers Windows and Linux. In short, LogoFAIL is a BIOS vulnerability.

The interesting part is that this security vulnerability in UEFI although very dangerous, it is not known exactly whether until now it has been exploited by hackers to attack the computers of users or companies around the world. The vulnerability has been around for many years (or maybe even decades), but was recently discovered and documented in a security vulnerability research study.

Details LogoFAIL: Security Vulnerability in UEFI

The attack consists of twenty vulnerabilities in image analyzers in UEFI, thus affecting almost all ecosystems of CPU x64 and ARM. LogoFAIL targets the logos displayed on the device screen during the boot process, exploiting vulnerabilities in image analyzers to replace legitimate logos with infected files. This manipulation allows the execution of arbitrary code during launch Driver Execution Environment (DXE), compromising the platform's security.

LogoFAIL can be executed remotely and bypass traditional protections such as Secure Boot or Intel’s Secure Boot. Once arbitrary code execution is done in the phase DXE, attackers gain full control over the target device's memory and disk, including the operating system. Imagine if a hacker could take control of your computer right from the start – they could access all your files, monitor what you do or even install programs malware. That's why LogoFAIL is a major problem.

In the coming period, device manufacturers, processors, and including UEFI vendors, will release updates and security patches to eliminate this security vulnerability in UEFI.

It is worth noting that computer users Mac are not affected by this vulnerability. Computers are not affected Mac Intel, and those with Apple Silicon doesn't use UEFI at all.

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