CVE-2019-6171 Security feature bypass in BIOS
Attackers with admin or physical access can bypass firmware signature checks to install unsigned Embedded Controller firmware on ThinkPad 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-2019-6171?
CVE-2019-6171 is a medium-severity vulnerability in Lenovo BIOS, published on 19 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was reported in various BIOS versions of older ThinkPad systems that could allow a user with administrative privileges or physical access the ability to update the Embedded Controller with unsigned firmware.
Which versions are affected by CVE-2019-6171?
It affects 148 products.
Products include Lenovo 20a7 Firmware, Lenovo 20a8 Firmware, Lenovo 20a9 Firmware, Lenovo 20aa Firmware, Lenovo 20ab Firmware, Lenovo 20ac Firmware and 142 more.
How do I fix CVE-2019-6171?
No fix has been published for CVE-2019-6171 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-6171 being exploited?
There is no known exploitation of CVE-2019-6171 in the wild and no public exploit code.
Sources
Also known as GHSA-8pxc-53gq-54c7.