Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-38576

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
03/01/2022
Last modified:
03/11/2025

Description

A BIOS bug in firmware for a particular PC model leaves the Platform authorization value empty. This can be used to permanently brick the TPM in multiple ways, as well as to non-permanently DoS the system.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.80
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:tianocore:edk2:201808:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:201811:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:201903:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:201905:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:201908:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:201911:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202002:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202005:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202011:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202102:*:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:202105:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools