9.1 - CVE-2021-20487

Executive Summary

Informations
Name	CVE-2021-20487	First vendor Publication	2021-05-26
Vendor	Cve	Last vendor Modification	2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Overall CVSS Score	9.1
Base Score	9.1	Environmental Score	9.1
impact SubScore	6	Temporal Score	9.1
Exploitabality Sub Score	2.3

Attack Vector	Network	Attack Complexity	Low
Privileges Required	High	User Interaction	None
Scope	Changed	Confidentiality Impact	High
Integrity Impact	High	Availability Impact	High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:P/I:P/A:P)
Cvss Base Score	6.5	Attack Range	Network
Cvss Impact Score	6.4	Attack Complexity	Low
Cvss Expoit Score	8	Authentication	Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20487

CWE : Common Weakness Enumeration

%	Id	Name
100 %	CWE-347	Improper Verification of Cryptographic Signature

CPE : Common Platform Enumeration

Type	Description	Count
Os	Ibm Power9 System Firmware cpe:2.3:o:ibm:power9_system_firmware::::::::	1
Os	Ibm Scale-Out Lc System Firmware cpe:2.3:o:ibm:scale-out_lc_system_firmware::::::::	1

Sources (Detail)

https://exchange.xforce.ibmcloud.com/vulnerabilities/197730
https://www.ibm.com/support/pages/node/6455911

Source	Url

Alert History

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Date	Informations
2024-11-28 13:50:48	Multiple Updates
2021-06-14 21:23:21	Multiple Updates
2021-06-03 00:22:51	Multiple Updates
2021-05-29 05:22:46	Multiple Updates
2021-05-26 21:23:09	First insertion