CVE-2022-36338 Code injection in n/a
Attackers can execute arbitrary code by replacing UEFI boot service pointers and triggering a software SMI in InsydeH2O firmware.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-36338?
CVE-2022-36338 is a high-severity code injection vulnerability in Insyde Insydeh2o, published on 23 Sep 2022. 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 Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver FwBlockServiceSmm, creating SMM, leads to arbitrary code execution. An attacker can replace the pointer to the UEFI boot service GetVariable with a pointer to malware, and then generate a software SMI.
Which versions are affected by CVE-2022-36338?
It affects 1 product.
Products include Insyde Insydeh2o.
How do I fix CVE-2022-36338?
No fix has been published for CVE-2022-36338 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-2022-36338 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-36338 exists.
Other vulnerabilities in Insyde Insydeh2o
Sources
Also known as GHSA-hhx4-8rv9-cwrp.