Google and Intel warn of critical flaw in Linux

Google and Intel have just unveiled a new Bluetooth flaw, called BleedingTooth, which concerns the Linux operating system. It allows access to a machine within range without any interaction on the targeted device. A Linux kernel update is already available.

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Definitely, bluetooth is still the victim of a new fault. This time, it is the devices using the operating system Linux that are affected. The problem was exposed on Twitter by Andy Nguyen, engineer at Google, who baptized him BleedingTooth.

does not communicate technical details, but promises an upcoming publication on the google official blog.

The researcher also shared a video that shows the exploitation of the fault to launch the calculator without any intervention on the victim device. The vulnerability is at the level of BlueZ, the stack of protocol Bluetooth used in Linux since kernel version 2.4.6. It therefore concerns computers Linux, but also many connected objects. Mobiles Android are however spared.

A demonstration of the flaw BleedingTooth, without any interaction on the victim device. © Andy Nguyen

Linux kernel update is available

Intel also posted a security advisory on this flaw, under reference CVE-2020-12351. The firm assigns it a severity of 8.3 out of 10, and details three distinct elements that allow elevation of privileges, disclosure of information and an attack of the type denied service.

Intel recommends updating the linux kernel to version 5.10 which is not impacted. For those who can’t, the company has included a list of patch links in its post. If this flaw is severe, the risk must be put into perspective since the attacker must be within range of the targeted device. However, updates are rare on connected objects, which may remain vulnerable until they are replaced.

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