CVE-2020-14372

Published Mar 3, 2021

Last updated a year ago

Overview

Description
A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.
Source
secalert@redhat.com
NVD status
Modified

Risk scores

CVSS 3.1

Type
Primary
Base score
7.5
Impact score
6
Exploitability score
0.8
Vector string
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Severity
HIGH

CVSS 2.0

Type
Primary
Base score
6.2
Impact score
10
Exploitability score
1.9
Vector string
AV:L/AC:H/Au:N/C:C/I:C/A:C

Weaknesses

secalert@redhat.com
CWE-184

Social media

Hype score
Not currently trending

Configurations