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‘Thunderclap’ vulnerability could leave Thunderbolt computers open to attacks

Wilbert Doyle by Wilbert Doyle
February 27, 2025

A group of researchers has discovered a new security vulnerability in the Thunderbolt records switch specification referred to as “Thunderclap” that would open computer systems to severe assaults from, in any other case, harmless USB-C or DisplayPort hardware.

As researcher Theo Markets explains, Thunderclap gains the privileged, direct-memory right of entry (DMA) that Thunderbolt accessories are granted to access the goal device. Unless proper protections are put in place in the region, hackers can use that to access the statistics and song files and run malicious code.

Thunderclap

It’s the kind of OS-degree entry usually granted to add-ons like GPUs or community cards. Because Thunderbolt is designed to duplicate those features externally, it requires an identical entry stage. However, the setup’s external nature makes it more vulnerable to assault. Fundamentally, plugging a malicious device into a port is less difficult than cracking open someone’s PC and plugging in a hacked snapshot card.

The Thunderclap vulnerability isn’t particular to Thunderbolt 3; older gadgets based totally on DisplayPort instead of USB-C are also theoretically at threat.

Markets and his group found the vulnerability in 2016 and have already launched it to manufacturers developing fixes: Apple rolled out a restore for a particular part of the worm in macOS 10.12. Four Macs that are identical in year and maximum and currently up to date must be protected in opposition to the assault. Windows 10 version 1803 also protects against the firmware level vulnerability for more moderen gadgets.

It’s not a form of attack most customers will usually stumble upon. (Hackers, using poisoned USB-C devices to target computers by pretending to be a fake GPU, normally don’t arise for most people.) But it’s a great reminder that you need to be careful about plugging your computer into accessories or chargers you disagree with.

And even though Thunderclap won’t hit your device, it highlights that even our fine requirements aren’t ideal, even for the excessive-give-up facet of the peripherals industry that Thunderbolt represents.

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Wilbert Doyle

Wilbert Doyle

I am a technology freak, I love new technologies and gadgets. I am always ready to learn new things, so I can share this knowledge with other people. and I am really happy when people like my blogs.

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