CVE-2020-12926 Explained : Impact and Mitigation

This CVE involves a vulnerability in AMD's fTPM implementation that could potentially compromise confidential key material in the Trusted Platform Modules (TPM) reference software.

Understanding CVE-2020-12926

This vulnerability could allow an attacker to compromise confidential information, alter executables signed by key material in the TPM, or create a denial of service on the device.

What is CVE-2020-12926?

The Trusted Platform Modules (TPM) reference software may not properly track failed shutdowns, leaving the TPM vulnerable to compromise.

The Impact of CVE-2020-12926

Attackers could potentially access confidential key material in the TPM.
The vulnerability could lead to the alteration of executables signed by key material in the TPM.
A denial of service attack on the device is also possible.

Technical Details of CVE-2020-12926

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the improper tracking of failed shutdowns in the TPM reference software.

Affected Systems and Versions

Product: AMD's fTPM implementation
Vendor: Not applicable
Versions: Each Linux distro determines its own version

Exploitation Mechanism

The attack requires physical access to the device to repeatedly turn the power on and off, potentially compromising the TPM.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Ensure physical security of devices to prevent unauthorized access.
Regularly update and patch systems to mitigate known vulnerabilities.

Long-Term Security Practices

Implement strong access controls and authentication mechanisms.
Monitor and audit system activities for any suspicious behavior.

Patching and Updates

Stay informed about security updates from AMD and relevant Linux distributions.
Apply patches promptly to address vulnerabilities and enhance system security.