CVE-2023-30633 Security feature bypass in n/a
Attackers with physical access or credentials can manipulate TPM PCR values to mask malware and bypass secure boot integrity checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-30633?
CVE-2023-30633 is a medium-severity vulnerability in Insyde Insydeh2o, published on 19 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Which versions are affected by CVE-2023-30633?
It affects 1 product.
Products include Insyde Insydeh2o.
How do I fix CVE-2023-30633?
No fix has been published for CVE-2023-30633 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-30633 being exploited?
There is no known exploitation of CVE-2023-30633 in the wild and no public exploit code.
Other vulnerabilities in Insyde Insydeh2o
Sources
Also known as GHSA-q98j-84jm-w837.