Today's Hard|Forum Post
Today's Hard|Forum Post

Thursday December 17, 2015

Break Into a Linux System by Pressing Backspace 28 Times

You can break into a system running Linux by pressing backspace 28 times? What? That sounds like something someone would just make up. eek!

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.