Linux systems that are at risk of compromising the BleedingTooth Bluetooth...

Linux systems that are at risk of compromising the BleedingTooth Bluetooth...
Linux systems that are at risk of compromising the BleedingTooth Bluetooth...
Linux-based operating systems are generally considered to be more secure than Windows operating systems. However, this does not mean that they are completely without any security issues. The security researcher from Google issued a warning about a number of “zero-click” vulnerabilities in the Linux Bluetooth stack.

Called BleedingTooth, the collection of vulnerabilities could allow attacks on remote code execution. The problem affects the Linux kernel 4.8 and higher and is in the open source BlueZ protocol stack. It was assigned CVE-2020-12351 and a CVSS score of 8.3.

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Over on GitHub, Google researchers share details about BleedingTooth, describing it as “heap-based type confusion in L2CAP”. The security researcher indicates that the vulnerability is severe and offers sample code as proof-of-concept that works on Ubuntu 20.04 LTS.

The team says about the vulnerability:

A remote attacker at close range, knowing the victim’s BD address, could send a malicious l2cap packet causing denial of service or possibly arbitrary code execution with kernel privileges. Malicious Bluetooth chips can also trigger the vulnerability.

Over on Twitter, Security Engineer Andy Nguyen shared updates about the vulnerability, including a video showing the click-and-click action of the vulnerability:

Intel has issued its own security advisory regarding this vulnerability and suggests that users apply a number of kernel patches to protect themselves and their systems.

Credit: Stanislaw Mikulski / Shutterstock

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