Insyde Security Advisory 2023027

Insyde ID Advisory Category Impact of Vulnerability Severity Rating Original Date Last Revised
INSYDE-SA-2023027 Software CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N 5.3 04/10/2023 04/10/2023


IhisiSmm: Possible out of bounds in IHISI command buffer, leading to tampering.

Vulnerability Details


IHISI function 0x17 verifies that the output buffer lies within the command buffer but does not verify that output data does not go beyond the end of the command buffer. In particular, the GetFlashTable function is called directly on the Command Buffer before the DataSize is check, leading to possible circumstances where the data immediately following the command buffer could be destroyed before returning a buffer size error.

Kernel 5.2: Version 05.27.20
Kernel 5.3: Version 05.36.20
Kernel 5.4: Version 05.44.20
Kernel 5.5: Version 05.52.20

Revision History:

Revision Date Description
1.0 04/10/2023 Initial Release
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