CVE-2020-8321 Code injection in BIOS
A vulnerability in the Lenovo BIOS System Lock Preinstallation driver allows arbitrary code execution via SMI callback functions.
- 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-2020-8321?
CVE-2020-8321 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A potential vulnerability in the SMI callback function used in the System Lock Preinstallation driver in some Lenovo Notebook and ThinkStation models may allow arbitrary code execution.
Which versions are affected by CVE-2020-8321?
It affects 172 products.
Products include Lenovo 130-14ast Firmware, Lenovo 130-14ikb Firmware, Lenovo 130-15ast Firmware, Lenovo 130-15ikb Firmware, Lenovo 320c-15ikb Firmware, Lenovo 330-14igm Firmware and 166 more.
How do I fix CVE-2020-8321?
No fix has been published for CVE-2020-8321 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-2020-8321 being exploited?
There is no known exploitation of CVE-2020-8321 in the wild and no public exploit code.
Sources
Also known as GHSA-7939-9jcj-5hqr.