CVE-2021-3453 Security feature bypass in BIOS
Attackers with physical access can bypass Intel Boot Guard to write to SPI flash, enabling persistent code execution on Lenovo systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3453?
CVE-2021-3453 is a medium-severity vulnerability in Lenovo BIOS, published on 16 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Some Lenovo Notebook, ThinkPad, and Lenovo Desktop systems have BIOS modules unprotected by Intel Boot Guard that could allow an attacker with physical access the ability to write to the SPI flash storage.
Weakness: CWE-693
Which versions are affected by CVE-2021-3453?
It affects 21 products.
Products include Lenovo 730s-13iml Firmware, Lenovo Ideacentre Aio 5-24imb05 Firmware, Lenovo Ideacentre Aio 5-74imb05 Firmware, Lenovo Ideapad 1-11igl05 Firmware, Lenovo Ideapad 1-14igl05 Firmware, Lenovo Ideapad S940-14iil Firmware and 15 more.
How do I fix CVE-2021-3453?
No fix has been published for CVE-2021-3453 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-3453 being exploited?
There is no known exploitation of CVE-2021-3453 in the wild and no public exploit code.
Sources
Also known as GHSA-rm7h-f39f-xc8f.