CVE Vulnerabilities

CVE-2021-20487

Improper Verification of Cryptographic Signature

Published: May 26, 2021 | Modified: Nov 21, 2024
CVSS 3.x
9.1
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS 2.x
6.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
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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.

Weakness

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Software

NameVendorStart VersionEnd Version
Power9_system_firmwareIbmfw930.00 (including)fw930.30 (excluding)
Power9_system_firmwareIbmfw940.00 (including)fw940.20 (excluding)

References