Insyde's Security Pledge
Insyde Security Advisory 2022003
|Insyde ID||Advisory Category||Impact of Vulnerability||Severity Rating||Original Date||Last Revised|
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.
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.
|1.1||02/08/2022||Added CVSS Rating|