CVE-2021-42554

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

03/02/2022

Last modified:

04/11/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.20 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.20

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0

7.20

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:insyde:insydeh2o::::::::	5.0 (including)	5.08.42 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.1 (including)	5.16.42 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.2 (including)	5.26.42 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.3 (including)	5.35.42 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.4 (including)	5.42.51 (excluding)
cpe:2.3:a:insyde:insydeh2o::::::::	5.5 (including)	5.50.51 (excluding)
cpe:2.3:o:siemens:simatic_field_pg_m5_firmware::::::::
cpe:2.3:h:siemens:simatic_field_pg_m5:-:::::::*
cpe:2.3:o:siemens:simatic_field_pg_m6_firmware::::::::
cpe:2.3:h:siemens:simatic_field_pg_m6:-:::::::*
cpe:2.3:o:siemens:simatic_ipc127e_firmware::::::::
cpe:2.3:h:siemens:simatic_ipc127e:-:::::::*
cpe:2.3:o:siemens:simatic_ipc227g_firmware::::::::
cpe:2.3:h:siemens:simatic_ipc227g:-:::::::*
cpe:2.3:o:siemens:simatic_ipc277g_firmware::::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-42554

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools