Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : grub2 vulnerability (USN-2836-1)

Medium Nessus Plugin ID 87408


The remote Ubuntu host is missing a security-related patch.


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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected grub2-common package.

Plugin Details

Severity: Medium

ID: 87408

File Name: ubuntu_USN-2836-1.nasl

Version: $Revision: 2.4 $

Type: local

Agent: unix

Published: 2015/12/16

Modified: 2016/05/24

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.9

Temporal Score: 5.9

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:U/RL:ND/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:grub2-common, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:15.04, cpe:/o:canonical:ubuntu_linux:15.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/12/15

Reference Information

CVE: CVE-2015-8370

OSVDB: 131484

USN: 2836-1