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CVE-2020-14372

CVE information

Published

3 years ago

Last Modified

5 months ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

High

Impact Analysis

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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..

CVSSv2.0 Score

Severity
Medium
Base Score
6.2/10
Exploit Score
1.9/10
Access Vector
Local
Access Complexity
High
Authentication Required
None
Impact Score
10/10
Confidentiality Impact
Complete
Availability Impact
Complete
Integrity Impact
Complete

CVSSv3.1 Score

Severity
High
Base Score
7.5/10
Exploit Score
0.8/10
Access Vector
Local
Access Complexity
High
Privileges Required
High
Impact Score
6/10
Confidentiality Impact
High
Availability Impact
High
Integrity Impact
High
Scope
Changed
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*
  Yes
- 2.06
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_eus:8.1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:
  Yes
- -

References