HIGH · 8.2

CVE-2021-42554

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 ...

Vulnerability 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 Score

8.2

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
InsydeInsydeh2O>= 5.0, < 5.08.42
SiemensSimatic Field Pg M5 FirmwareAll versions
SiemensSimatic Field Pg M5-
SiemensSimatic Field Pg M6 FirmwareAll versions
SiemensSimatic Field Pg M6-
SiemensSimatic Ipc127E FirmwareAll versions
SiemensSimatic Ipc127E-
SiemensSimatic Ipc227G FirmwareAll versions
SiemensSimatic Ipc227G-
SiemensSimatic Ipc277G FirmwareAll versions
SiemensSimatic Ipc277G-
SiemensSimatic Ipc327G FirmwareAll versions
SiemensSimatic Ipc327G-
SiemensSimatic Ipc377G FirmwareAll versions
SiemensSimatic Ipc377G-
SiemensSimatic Ipc427E FirmwareAll versions
SiemensSimatic Ipc427E-
SiemensSimatic Ipc477E FirmwareAll versions
SiemensSimatic Ipc477E-
SiemensSimatic Ipc627E FirmwareAll versions

Related Weaknesses (CWE)

References

FAQ

What is CVE-2021-42554?

CVE-2021-42554 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 ...

How severe is CVE-2021-42554?

CVE-2021-42554 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-42554?

Check the references section above for vendor advisories and patch information. Affected products include: Insyde Insydeh2O, Siemens Simatic Field Pg M5 Firmware, Siemens Simatic Field Pg M5, Siemens Simatic Field Pg M6 Firmware, Siemens Simatic Field Pg M6.