CVE-2023-34195 Code injection in n/a

High 7.8 Published 18 Sep 2023 Updated 25 Sep 2024

Attackers can achieve arbitrary code execution in the DXE phase by manipulating a UEFI variable used as a function pointer in InsydeH2O firmware.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-34195?

CVE-2023-34195 is a high-severity code injection vulnerability in Insyde Insydeh2o, published on 18 Sep 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 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.

Weakness: CWE-94

Which versions are affected by CVE-2023-34195?

It affects 1 product.

Products include Insyde Insydeh2o.

How do I fix CVE-2023-34195?

No fix has been published for CVE-2023-34195 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-34195 being exploited?

There is no known exploitation of CVE-2023-34195 in the wild and no public exploit code.

All Insyde Insydeh2o vulnerabilities

Sources

Also known as GHSA-xjr2-gpjv-fx34.