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[email protected]CVE-2021-38576

HistoryJan 03, 2022 - 10:15 p.m.

CVE-2021-38576

2022-01-0322:15:09

[email protected]

web.nvd.nist.gov

bios bug

firmware

pc model

platform authorization

tpm

dos

cve-2021-38576

nvd

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.3 High

AI Score

Confidence

High

7.8 High

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.001 Low

EPSS

Percentile

32.2%

JSON

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.

Affected configurations

NVD

Node

tianocoreedk2Match201808

tianocoreedk2Match201811

tianocoreedk2Match201903

tianocoreedk2Match201905

tianocoreedk2Match201908

tianocoreedk2Match201911

tianocoreedk2Match202002

tianocoreedk2Match202005

tianocoreedk2Match202008

tianocoreedk2Match202011

tianocoreedk2Match202102

tianocoreedk2Match202105

CPENameOperatorVersion
tianocore:edk2tianocore edk2eq201808
tianocore:edk2tianocore edk2eq201811
tianocore:edk2tianocore edk2eq201903
tianocore:edk2tianocore edk2eq201905
tianocore:edk2tianocore edk2eq201908
tianocore:edk2tianocore edk2eq201911
tianocore:edk2tianocore edk2eq202002
tianocore:edk2tianocore edk2eq202005
tianocore:edk2tianocore edk2eq202008
tianocore:edk2tianocore edk2eq202011

CPE	Name	Operator	Version
tianocore:edk2	tianocore edk2	eq	201808
tianocore:edk2	tianocore edk2	eq	201811
tianocore:edk2	tianocore edk2	eq	201903
tianocore:edk2	tianocore edk2	eq	201905
tianocore:edk2	tianocore edk2	eq	201908
tianocore:edk2	tianocore edk2	eq	201911
tianocore:edk2	tianocore edk2	eq	202002
tianocore:edk2	tianocore edk2	eq	202005
tianocore:edk2	tianocore edk2	eq	202008
tianocore:edk2	tianocore edk2	eq	202011

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CNA Affected

[
  {
    "product": "EDK II",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "edk2-stable202105, edk2-stable202102, edk2-stable202011, edk2-stable202008, edk2-stable202005, edk2-stable202002, edk2-stable201911, edk2-stable201908, edk2-stable201905, edk2-stable201903, edk2-stable201811, edk2-stable201808"
      }
    ]
  }
]