Linux

48718 readers

1132 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

354

Just about every Windows and Linux device vulnerable to new LogoFAIL firmware attack (arstechnica.com)

submitted 1 year ago by [email protected] to c/[email protected]

104 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 31 points 1 year ago (2 children)

As its name suggests, LogoFAIL involves logos, specifically those of the hardware seller that are displayed on the device screen early in the boot process, while the UEFI is still running. Image parsers in UEFIs from all three major IBVs are riddled with roughly a dozen critical vulnerabilities that have gone unnoticed until now. By replacing the legitimate logo images with identical-looking ones that have been specially crafted to exploit these bugs, LogoFAIL makes it possible to execute malicious code at the most sensitive stage of the boot process, which is known as DXE, short for Driver Execution Environment.

So, does disabling the boot logo prevent the attack, or would it only make the attack obvious?

[–] [email protected] 15 points 1 year ago (1 children)

If you have access to replace the logo file, you probably have access to enable it as well.

[–] [email protected] 6 points 1 year ago

Not necessarily, I guess. They're talking about a firmware upgrade of sorts, and, at least on the machines I own(ed), performing it didn't reset user settings (which disabling the logo is)