CVE-2021-42554 Information

Description

An issue was discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42 Kernel 5.1 before 05.16.42 Kernel 5.2 before 05.26.42 Kernel 5.3 before 05.35.42 Kernel 5.4 before 05.42.51 and Kernel 5.5 before 05.50.51. An SMM memory corruption vulnerability in FvbServicesRuntimeDxe allows a possible attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Reference

https://www.insyde.com/security-pledge https://www.insyde.com/security-pledge/SA-2022012 https://security.netapp.com/advisory/ntap-20220216-0007/ https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.2