CVE-2021-3599 Privilege escalation in ThinkPad BIOS
Local attackers with elevated privileges can execute arbitrary code via a flaw in the ThinkPad BIOS SMI callback function.
- 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-2021-3599?
CVE-2021-3599 is a medium-severity vulnerability in Lenovo ThinkPad BIOS, published on 12 Nov 2021. 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 to access flash device in some ThinkPad models may allow an attacker with local access and elevated privileges to execute arbitrary code.
Weakness: CWE-20
Which versions are affected by CVE-2021-3599?
It affects 133 products.
Products include Lenovo Ideapad S940-14iwl Firmware, Lenovo Ideapad Yoga S940-14iwl Firmware, Lenovo Thinkpad 10 Firmware, Lenovo Thinkpad 11e 3rd Gen Firmware, Lenovo Thinkpad 11e 4th Gen Firmware, Lenovo Thinkpad 11e Yoga Gen 6 Firmware and 127 more.
How do I fix CVE-2021-3599?
No fix has been published for CVE-2021-3599 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-3599 being exploited?
There is no known exploitation of CVE-2021-3599 in the wild and no public exploit code.
Other vulnerabilities in Lenovo ThinkPad BIOS
Sources
Also known as GHSA-7jgm-fxw4-3rp9.