A vulnerability was found in Insyde InsydeH2O up to 5.5. It has been rated as problematic. Affected by this issue is the function GetImage of the component SystemFirmwareManagementRuntimeDxe. The manipulation of the argument GetImageProgress with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The software constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in SystemFirmwareManagementRuntimeDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. The implementation of the GetImage method retrieves the value of a runtime variable named GetImageProgress, and later uses this value as a function pointer. This variable is wiped out by the same module near the end of the function. By setting this UEFI variable from the OS to point into custom code, an attacker could achieve arbitrary code execution in the DXE phase, before several chipset locks are set.

The weakness was shared 09/18/2023. The advisory is available at insyde.com. This vulnerability is handled as CVE-2023-34195 since 05/30/2023. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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• Insyde

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• InsydeH2O

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• commercial

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