CVE-2021-46765 : What You Need to Know

CVE-2021-46765 is a vulnerability identified in AMD processors that could allow an attacker to induce out-of-bounds memory reads, potentially leading to a denial of service attack.

Understanding CVE-2021-46765

What is CVE-2021-46765?

Insufficient input validation in the AMD Platform Security Processor (ASP) may permit an attacker with compromised System Management Mode (SMM) to trigger out-of-bounds memory reads within ASP, potentially resulting in a denial of service.

The Impact of CVE-2021-46765

Exploitation of this vulnerability could lead to denial of service attacks, impacting the availability and performance of affected systems.

Technical Details of CVE-2021-46765

Vulnerability Description

The vulnerability arises from insufficient input validation in the AMD Platform Security Processor, enabling an attacker with compromised SMM to trigger out-of-bounds memory reads within ASP.

Affected Systems and Versions

Affected products include Ryzen™ 5000 Series Desktop processors, Ryzen™ 3000 Series Mobile Processors, Ryzen™ 5000 Series Mobile Processors, and Ryzen™ 6000 Series Mobile Processors.
All affected versions are noted as 'various'.

Exploitation Mechanism

The vulnerability allows an attacker with compromised SMM to induce out-of-bounds memory reads within the ASP, potentially leading to a denial of service.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by AMD promptly.
Monitor AMD's security bulletin for updates and guidance.

Long-Term Security Practices

Implement robust security measures at all levels of the system to mitigate similar vulnerabilities.
Regularly update and patch systems to address security issues.
Conduct security audits and assessments periodically.

Patching and Updates

Stay informed about security patches and updates from AMD to safeguard the affected systems.