CVE-2023-30633

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-19 · updated 2026-06-17

Description

An issue was discovered in TrEEConfigDriver in Insyde InsydeH2O with kernel 5.0 through 5.5. It can report false TPM PCR values, and thus mask malware activity. Devices use Platform Configuration Registers (PCRs) to record information about device and software configuration to ensure that the boot process is secure. (For example, Windows uses these PCR measurements to determine device health.) A vulnerable device can masquerade as a healthy device by extending arbitrary values into Platform Configuration Register (PCR) banks. This requires physical access to a target victim's device, or compromise of user credentials for a device. This issue is similar to CVE-2021-42299 (on Surface Pro devices).

Affected products

Insydeh2O: from 5.3 before 5.3.05.37.17; from 5.4 before 5.4.05.45.17; from 5.5 before 5.5.05.53.17; from 5.6 before 5.6.05.60.17; 5.2 — fixed in 5.3.05.37.17, 5.4.05.45.17, 5.5.05.53.17, 5.6.05.60.17

How to fix

Upgrade to a fixed version: Insydeh2O 5.3.05.37.17, 5.4.05.45.17, 5.5.05.53.17, 5.6.05.60.17. Check the vendor advisory for mitigations.

References

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