CVE-2020-12926 Race condition in AMD's fTPM implementation
Physical attackers can exploit a race condition in AMD fTPM to compromise keys, modify signed executables, or cause denial of service.
- 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-2020-12926?
CVE-2020-12926 is a medium-severity vulnerability in AMD's fTPM implementation, published on 12 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave the TPM in a state where confidential key material in the TPM may be able to be compromised. AMD believes that the attack requires physical access of the device because the power must be repeatedly turned on and off. This potential attack may be used to change confidential information, alter executables signed by key material in the TPM, or create a denial of service of the device.
Weakness: CWE-367
Which versions are affected by CVE-2020-12926?
It affects 1 product.
Products include Amd Trusted Platform Modules Reference.
How do I fix CVE-2020-12926?
No fix has been published for CVE-2020-12926 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-12926 being exploited?
There is no known exploitation of CVE-2020-12926 in the wild and no public exploit code.
Sources
Also known as GHSA-898h-342v-mpjx.