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CVE-2021-38576

Date: January 3, 2022

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.

Severity Score

Related Resources (5)

https://security-tracker.debian.org/tracker/CVE-2021-38576
https://bugzilla.tianocore.org/show_bug.cgi?id=3499
https://nvd.nist.gov/vuln/detail/CVE-2021-38576
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-38576
https://www.mend.io/vulnerability-database/CVE-2021-38576

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
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

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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