Amazon Kindle flaws could have allowed attackers to control the device: In February 2021, Check Point alerted Amazon to its findings, prompting the company to roll out a fix in version 5.13.5 version of the Kindle’s firmware update in April 2021. The update automatically is installed on Kindle devices when connected to the internet.

To check the firmware version on your Kindle, go to Settings, select Menu, and then tap Device Info. Check Point also advises Kindle users to apply common sense and not open or download any e-books that look suspicious or come from untrusted sources.

Before Amazon patched the security flaws, a Kindle user could have unknowingly triggered the exploit just by opening a malicious e-book sent by the attacker, Check Point said. No other action would have been required. With the vulnerabilities exploited, an attacker could have gained remote control to delete a user’s e-books and even turn the Kindle into a malicious bot to attack other devices on the user’s network.

By using a malicious e-book, the attacker also could have targeted a specific audience. In one example cited by Yaniv Balmas, head of cyber research at Check Point Software, a cybercriminal who wanted to target Romanian citizens would simply need to publish some free and popular e-books written in Romanian. The attacker would then be fairly certain that the potential victims would all be Romanian, a type of knowledge that would help them launch further malicious campaigns against these users.

“Kindle, like other IoT devices, are often thought of as innocuous and disregarded as security risks,” Balmas said. “But our research demonstrates that any electronic device, at the end of the day, is some form of computer. And as such, these IoT devices are vulnerable to the same attacks as computers. Everyone should be aware of the cyber risks in using anything connected to the computer, especially something as ubiquitous as Amazon’s Kindle.”

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