Vulnerability in Amd Trusted Platform Modules Reference
CVE-2020-12926
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.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.002 (11.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Amd Trusted_platform_modules_reference
- N/a Amd's Ftpm Implementation — versions Each Linux distro determines its own version.
Weakness classification (CWE)
References
- psirt@amd.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-12926?
- CVE-2020-12926 is a medium-severity vulnerability in Amd Trusted Platform Modules Reference, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.4/10. Published 2020-11-12.
- How severe is CVE-2020-12926?
- Medium severity. CVSS v3 base score is 6.4 out of 10.