CVE-2021-26334 : Exploit Details and Defense Strategies
Gain insights into CVE-2021-26334, a vulnerability in AMD's μProf Tool driver allowing privilege escalation. Learn about its impact, affected systems, mitigation steps, and more.
This article provides an overview of CVE-2021-26334, a vulnerability in the AMDPowerProfiler.sys driver of AMD's μProf Tool that may lead to privilege escalation and code execution.
Understanding CVE-2021-26334
In this section, we will delve into the details of the AMD Chipset Driver Information Disclosure Vulnerability.
What is CVE-2021-26334?
The AMDPowerProfiler.sys driver of AMD μProf Tool allows lower privileged users to access MSRs in the kernel, potentially resulting in privilege escalation and ring-0 code execution by the lower privileged user.
The Impact of CVE-2021-26334
This vulnerability could be exploited by attackers to gain elevated privileges on affected systems, posing a significant security risk.
Technical Details of CVE-2021-26334
Let's explore the technical aspects of this vulnerability in more detail.
Vulnerability Description
The AMDPowerProfiler.sys driver issue enables unauthorized users to manipulate MSRs in the kernel, facilitating privileged escalation and unauthorized code execution.
Affected Systems and Versions
The μProf Tool version less than 3.4.494 is impacted by this vulnerability, specifically affecting users running this version of the tool.
Exploitation Mechanism
Attackers with lower privileges can exploit this vulnerability to gain kernel-level access, execute arbitrary code, and potentially compromise the entire system.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-26334.
Immediate Steps to Take
Users should prioritize updating the μProf Tool to version 3.4.494 or newer to address this vulnerability promptly and prevent its exploitation.
Long-Term Security Practices
Implementing the principle of least privilege, regular security updates, and monitoring for unauthorized system access can enhance overall security posture.
Patching and Updates
Stay informed about security advisories from AMD and promptly apply patches and updates to keep systems secure against emerging threats.