CVE-2021-20487

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

IBM Power9 Self Boot Engine(SBE) could allow a privileged user to inject malicious code and compromise the integrity of the host firmware bypassing the host firmware signature verification process.

IBM Power9 Self Boot Engine (SBE), podría permitir a un usuario privilegiado inyectar código malicioso y comprometer la integridad del firmware del host al omitir el proceso de comprobación de la firma del firmware del host

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-05-26 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://exchange.xforce.ibmcloud.com/vulnerabilities/197730	2021-06-14
https://www.ibm.com/support/pages/node/6455911	2021-06-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9008-22l Search vendor "Ibm" for product "9008-22l"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9009-22a Search vendor "Ibm" for product "9009-22a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9009-41a Search vendor "Ibm" for product "9009-41a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9009-42a Search vendor "Ibm" for product "9009-42a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9040-mr9 Search vendor "Ibm" for product "9040-mr9"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9080-m9s Search vendor "Ibm" for product "9080-m9s"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9223-22h Search vendor "Ibm" for product "9223-22h"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw930.00 < fw930.30 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw930.00 < fw930.30"	-	Affected	in	Ibm Search vendor "Ibm"	9223-42h Search vendor "Ibm" for product "9223-42h"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9008-22l Search vendor "Ibm" for product "9008-22l"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9009-22a Search vendor "Ibm" for product "9009-22a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9009-41a Search vendor "Ibm" for product "9009-41a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9009-42a Search vendor "Ibm" for product "9009-42a"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9040-mr9 Search vendor "Ibm" for product "9040-mr9"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9080-m9s Search vendor "Ibm" for product "9080-m9s"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9223-22h Search vendor "Ibm" for product "9223-22h"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	>= fw940.00 < fw940.20 Search vendor "Ibm" for product "Power9 System Firmware" and version " >= fw940.00 < fw940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9223-42h Search vendor "Ibm" for product "9223-42h"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	< fw950.00 Search vendor "Ibm" for product "Power9 System Firmware" and version " < fw950.00"	-	Affected	in	Ibm Search vendor "Ibm"	9009-22g Search vendor "Ibm" for product "9009-22g"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	< fw950.00 Search vendor "Ibm" for product "Power9 System Firmware" and version " < fw950.00"	-	Affected	in	Ibm Search vendor "Ibm"	9009-41g Search vendor "Ibm" for product "9009-41g"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	< fw950.00 Search vendor "Ibm" for product "Power9 System Firmware" and version " < fw950.00"	-	Affected	in	Ibm Search vendor "Ibm"	9009-42g Search vendor "Ibm" for product "9009-42g"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	< fw950.00 Search vendor "Ibm" for product "Power9 System Firmware" and version " < fw950.00"	-	Affected	in	Ibm Search vendor "Ibm"	9223-22s Search vendor "Ibm" for product "9223-22s"	-	-	Safe
Ibm Search vendor "Ibm"	Power9 System Firmware Search vendor "Ibm" for product "Power9 System Firmware"	< fw950.00 Search vendor "Ibm" for product "Power9 System Firmware" and version " < fw950.00"	-	Affected	in	Ibm Search vendor "Ibm"	9223-42s Search vendor "Ibm" for product "9223-42s"	-	-	Safe
Ibm Search vendor "Ibm"	Scale-out Lc System Firmware Search vendor "Ibm" for product "Scale-out Lc System Firmware"	< op940.20 Search vendor "Ibm" for product "Scale-out Lc System Firmware" and version " < op940.20"	-	Affected	in	Ibm Search vendor "Ibm"	8335-gth Search vendor "Ibm" for product "8335-gth"	-	-	Safe
Ibm Search vendor "Ibm"	Scale-out Lc System Firmware Search vendor "Ibm" for product "Scale-out Lc System Firmware"	< op940.20 Search vendor "Ibm" for product "Scale-out Lc System Firmware" and version " < op940.20"	-	Affected	in	Ibm Search vendor "Ibm"	8335-gtx Search vendor "Ibm" for product "8335-gtx"	-	-	Safe
Ibm Search vendor "Ibm"	Scale-out Lc System Firmware Search vendor "Ibm" for product "Scale-out Lc System Firmware"	< op940.20 Search vendor "Ibm" for product "Scale-out Lc System Firmware" and version " < op940.20"	-	Affected	in	Ibm Search vendor "Ibm"	9183-22x Search vendor "Ibm" for product "9183-22x"	-	-	Safe