Insyde's Security Pledge

Recent Security Advisories

INSYDE-SA-2022001

Product

CVSS Score

Original Date

Last Revised

InsydeH2O

8.2

2022-01-04

2022-01-04

Summary

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer.

Vulnerability Details

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

CVE-2021-45971

This corresponds to CVE-2021-45971. It affects the driver SdHostDriver. A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(CommBufferData). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

This issue was discovered by Insyde engineering during an internal security review of several Insyde drivers and entered as a security incident on May 28, 2021.

Solution Information

This was fixed in the following Insyde kernel versions on June 18, 2021.

  • Kernel 5.1: 05.16.25
  • Kernel 5.2: 05.26.25
  • Kernel 5.3: 05.35.25
  • Kernel 5.4: 05.43.25
  • Kernel 5.5: 05.51.25.

Acknowledgements

This was independently reported by Binarly (BRLY-2021-012) in September 2021.

Revision History

Revision #

Date

Description

1

2022-01-04

Initial Release

2022-01-04