CVE-2020-15705

Published Jul 29, 2020

Last updated 3 years ago

Overview

Description
GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.
Source
security@ubuntu.com
NVD status
Analyzed

Risk scores

CVSS 3.1

Type
Primary
Base score
6.4
Impact score
5.9
Exploitability score
0.5
Vector string
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Severity
MEDIUM

CVSS 2.0

Type
Primary
Base score
4.4
Impact score
6.4
Exploitability score
3.4
Vector string
AV:L/AC:M/Au:N/C:P/I:P/A:P

Weaknesses

nvd@nist.gov
CWE-347
security@ubuntu.com
CWE-347

Social media

Hype score
Not currently trending

Configurations