CVE-2021-38576
Published: 3 January 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.
Notes
Author | Note |
---|---|
Priority reason: edk2 package can't be bricked like real hardware |
Priority
Status
Package | Release | Status |
---|---|---|
edk2 Launchpad, Ubuntu, Debian |
lunar |
Not vulnerable
(2022.11-6)
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Ignored
(end of life)
|
|
bionic |
Needed
|
|
focal |
Needed
|
|
jammy |
Not vulnerable
(2022.02-3ubuntu0.22.04.1)
|
|
kinetic |
Not vulnerable
(2022.05-4)
|
|
mantic |
Not vulnerable
(2023.02-2)
|
|
Patches: upstream: https://github.com/tianocore/edk2/pull/1968 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |