Executive Summary

Summary
Title GRUB vulnerability
Informations
Name USN-2836-1 First vendor Publication 2015-12-15
Vendor Ubuntu Last vendor Modification 2015-12-15
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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 versions:

Ubuntu 15.10:
grub2-common 2.02~beta2-29ubuntu0.2

Ubuntu 15.04:
grub2-common 2.02~beta2-22ubuntu1.4

Ubuntu 14.04 LTS:
grub2-common 2.02~beta2-9ubuntu1.6

Ubuntu 12.04 LTS:
grub2-common 1.99-21ubuntu3.19

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

References:
http://www.ubuntu.com/usn/usn-2836-1
CVE-2015-8370

Package Information:
https://launchpad.net/ubuntu/+source/grub2/2.02~beta2-29ubuntu0.2
https://launchpad.net/ubuntu/+source/grub2/2.02~beta2-22ubuntu1.4
https://launchpad.net/ubuntu/+source/grub2/2.02~beta2-9ubuntu1.6
https://launchpad.net/ubuntu/+source/grub2/1.99-21ubuntu3.19

Original Source

Url : http://www.ubuntu.com/usn/USN-2836-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-264 Permissions, Privileges, and Access Controls

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 5
Os 1

Nessus® Vulnerability Scanner

Date Description
2018-08-17 Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2016-0012.nasl - Type : ACT_GATHER_INFO
2016-03-04 Name : The remote Fedora host is missing a security update.
File : fedora_2015-cebe5133e7.nasl - Type : ACT_GATHER_INFO
2016-03-04 Name : The remote Fedora host is missing a security update.
File : fedora_2015-90c27b6e91.nasl - Type : ACT_GATHER_INFO
2016-01-20 Name : The remote Solaris system is missing a security patch from CPU jan2016.
File : solaris_jan2016_SRU11_3_4_5_0.nasl - Type : ACT_GATHER_INFO
2016-01-14 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL25901386.nasl - Type : ACT_GATHER_INFO
2016-01-07 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2016-10.nasl - Type : ACT_GATHER_INFO
2016-01-04 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-2399-1.nasl - Type : ACT_GATHER_INFO
2015-12-30 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-2385-1.nasl - Type : ACT_GATHER_INFO
2015-12-30 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-2387-1.nasl - Type : ACT_GATHER_INFO
2015-12-30 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-2386-1.nasl - Type : ACT_GATHER_INFO
2015-12-29 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2015-957.nasl - Type : ACT_GATHER_INFO
2015-12-22 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20151215_grub2_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2015-12-21 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201512-03.nasl - Type : ACT_GATHER_INFO
2015-12-18 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2015-351-01.nasl - Type : ACT_GATHER_INFO
2015-12-17 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3421.nasl - Type : ACT_GATHER_INFO
2015-12-17 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2015-2623.nasl - Type : ACT_GATHER_INFO
2015-12-16 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-2836-1.nasl - Type : ACT_GATHER_INFO
2015-12-16 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-2623.nasl - Type : ACT_GATHER_INFO
2015-12-16 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2015-2623.nasl - Type : ACT_GATHER_INFO
2015-12-14 Name : The remote Debian host is missing a security update.
File : debian_DLA-368.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2016-01-22 09:27:02
  • Multiple Updates
2015-12-17 21:29:17
  • Multiple Updates
2015-12-17 13:26:54
  • Multiple Updates
2015-12-17 05:28:06
  • Multiple Updates
2015-12-15 21:24:39
  • First insertion