Vulnerability Details : CVE-2021-38576
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-38576
- cpe:2.3:a:tianocore:edk2:202008:*:*:*:*:*:*:*
- cpe:2.3:a:tianocore:edk2:201905:*:*:*:*:*:*:*
- 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:edk2:201908:*:*:*:*:*:*:*
- 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:edk2:202011:*:*:*:*:*:*:*
- cpe:2.3:a:tianocore:edk2:202102:*:*:*:*:*:*:*
- cpe:2.3:a:tianocore:edk2:202105:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-38576
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-38576
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.8
|
HIGH | AV:N/AC:L/Au:N/C:N/I:N/A:C |
10.0
|
6.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
References for CVE-2021-38576
-
https://bugzilla.tianocore.org/show_bug.cgi?id=3499
Bug Access DeniedIssue Tracking;Permissions Required;Third Party Advisory
Jump to