Alerton visual logic software9/7/2023 ![]() ![]() Please see the readme.txt in the download for more licensing and use details. 21 Kernel 5.1: Version 05.17.21 Kernel 5.2: Version 05.27.21 Kernel 5.3: Version 05.36.21 Kernel 5.4: Version 05.44.21 Kernel 5.5: Version 05.52. The Alerton VisualLogic Toolkit-AX license is included with the Alerton Brand AX Engineering software (ALR-ENG-DEMO-AX). This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. The SMM code code attempts to sanitize pointers to ensure all pointers refer to the working buffer, but when a pointer is not found in the list of pointers to sanitize, the current action is not aborted, leading to undefined behavior. ![]() The buffer can be corrupted by DMA transfers. ![]() The code which uses can be inside of SMM, making the working buffer untrusted input. In UsbCoreDxe, tampering with the contents of the USB working buffer using DMA while certain USB transactions are in process leads to a TOCTOU problem that could be used by an attacker to cause SMRAM corruption and escalation of privileges The UsbCoreDxe module creates a working buffer for USB transactions outside of SMRAM. ![]()
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