USN-2836-1: GRUB vulnerability

Ubuntu Security Notice USN-2836-1

15th December, 2015

grub2 vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 15.10



• Ubuntu 15.04



• Ubuntu 14.04 LTS



• Ubuntu 12.04 LTS

Summary

GRUB password protection can be bypassed.

Software description

• grub2
  - GRand Unified Bootloader
  
  

Details

Hector Marco and Ismael Ripoll discovered that GRUB incorrectly handled
the backspace key when configured to use authentication. A local attacker
could use this issue to bypass GRUB password protection.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 15.10:

Ubuntu 15.04:

Ubuntu 14.04 LTS:

Ubuntu 12.04 LTS:

To update your system, please follow these instructions: