You Can Break Into a Linux System by Pressing Backspace 28 Times. Here's How to Fix It
Hitting a key over and over again actually works for once. Two
The researchers, Hector Marco and Ismael Ripoll from the Cybersecurity Group at Polytechnic University of Valencia , found that it's possible to bypass all security of a locked-down Linux machine by exploiting a bug in the Grub2 bootloader. Essentially, hitting backspace 28 times when the machine asks for your username accesses the "Grub rescue shell," and once there, you can access the computer's data or install malware. Fortunately, Marco and Ripoll have made an emergency patch to fix the Grub2 vulnerability. Ubuntu , Red Hat , and Debian have all issued patches to fix it as well.
Linux is often thought of as a super secure operating system, but this is a good reminder to
take physical security just as seriously