USN-2836-1: GRUB vulnerability

Releases

• Ubuntu 15.10
• Ubuntu 15.04
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• 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 versions:

Ubuntu 15.10

• grub2-common - 2.02~beta2-29ubuntu0.2

Ubuntu 15.04

• grub2-common - 2.02~beta2-22ubuntu1.4

Ubuntu 14.04

• grub2-common - 2.02~beta2-9ubuntu1.6

Ubuntu 12.04

• grub2-common - 1.99-21ubuntu3.19

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

• CVE-2015-8370