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BlueBorne Threatens 5 Billion Bluetooth Devices

More than 5 billion devices are vulnerable to a set of eight Bluetooth flaws, even if they aren't in discoverable mode.

Computer and mobile users have long believed that everything is better with Bluetooth. It turns out that criminal hackers may very well agree. A group of eight vulnerabilities -- collectively known as "BlueBorne" -- makes roughly 5.3 billion devices subject to intrusion.

Armis Labs discovered the vulnerabilities and followed the rules of responsible disclosure by giving information to hardware and software vendors prior to public disclosure to allow time for patches to be written and distributed before exploits were likely to appear in the wild. That's the first bit of good news.

The next bit of good news is that some major vendors have taken advantage of the advance notice to patch systems and reduce customer exposure to the flaws. Google and Microsoft have recently issued patches that address the issues and many Linux distros are in the process of releasing patches. Apple managed to fix the vulnerabilities earlier; any users whose devices are on current or near-current versions of operating systems for Apple computers or devices are safe.


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Now for the bad news. Many of the devices containing vulnerable Bluetooth implementations cannot or will not be patched. The only way for these devices to be safe is for Bluetooth to be disabled.

That's because of the "silent" nature of the attacks possible through these vulnerabilities. A targeted Bluetooth-equipped device will not have to be in discoverable mode to be vulnerable. Users and security systems won't be able to use connected device lists for protection because the vulnerable devices doesn't have to be paired with the attacker's device to be vulnerable.

Once infected, a single device can be the source of lateral infection for other Bluetooth-equipped systems in the organization. That infection could take place very quickly and just as silently as the original exploit. That's the exploit: What could an attacker do through these vulnerabilities?

The payload carried by these exploits could include botnet, ransomware, spyware or virtually any other malware attack. All delivered silently and quickly to virtually every mobile and desktop device in the organization.

What is a company to do to protect itself? First, make sure that all mobile and personal computing devices are running current software versions. If devices can't be updated to current operating systems, then turn off Bluetooth on any non-current device. If you have devices that can be neither updated nor turned off, then it's time to take a serious look at your refresh cycles: This threat is no joke.

Related posts:

— Curtis Franklin is the editor of SecurityNow.com. Follow him on Twitter @kg4gwa.

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