CVE-2021-4211 Code injection in BIOS
Local attackers with elevated privileges can execute arbitrary code via a vulnerability in the Lenovo BIOS SMBIOS event log driver.
- 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-2021-4211?
CVE-2021-4211 is a medium-severity code injection vulnerability in Lenovo BIOS, published on 22 Apr 2022. 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 SMBIOS event log driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.
Weakness: CWE-20
Which versions are affected by CVE-2021-4211?
It affects 53 products.
Products include Lenovo A340-22icb Firmware, Lenovo A340-22ick Firmware, Lenovo A340-24icb Firmware, Lenovo A340-24ick Firmware, Lenovo A540-24icb Firmware, Lenovo A540-27icb Firmware and 47 more.
How do I fix CVE-2021-4211?
No fix has been published for CVE-2021-4211 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-2021-4211 being exploited?
There is no known exploitation of CVE-2021-4211 in the wild and no public exploit code.
Sources
Also known as GHSA-rxqj-f9pj-x22r.