Insyde's Security Pledge
Insyde Security Advisory 2022003
| Insyde ID | Advisory Category | Impact of Vulnerability | Severity Rating | Original Date | Last Revised |
| INSYDE-SA-2022003 | Software | AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H | 8.2 | 01/04/2022 | 01/04/2022 |
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(CommBuffer + 8 location). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.
Vulnerability Details
This corresponds to CVE-2021-45969. It affects the driver AhciBusDxe. 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. It was independently reported by Binaryly (BRLY-2021-016) in September 2021. It was fixed in the following Insyde kernel versions on June 18, 2021. It was fixed in the following versions: 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. This issue was previously reported incorrectly as part of CVE-2020-27339.
Revision History:
| Revision | Date | Description |
| 1.0 | 01/04/2022 | Initial Release |
| 1.1 | 02/08/2022 | Added CVSS Rating |