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
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