Overview
CVE-2024-21923 is a high-severity vulnerability affecting AMD StoreMI™. This vulnerability stems from incorrect default permissions, potentially allowing a local attacker to elevate their privileges and execute arbitrary code on the affected system. This poses a significant security risk and requires immediate attention.
Technical Details
The vulnerability arises from overly permissive default permissions assigned during the installation or configuration of AMD StoreMI™. An attacker with local access can exploit these misconfigured permissions to gain elevated privileges. The specific files or directories affected are not explicitly detailed in the public advisory but the core issue is a lack of proper access control lists (ACLs).
Specifically, the incorrect default permissions could allow a user with limited privileges to modify critical StoreMI™ files or settings. By manipulating these components, an attacker can potentially inject malicious code or alter the system’s behavior to execute arbitrary commands with elevated privileges.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2024-21923 is 7.3, indicating a HIGH severity vulnerability. The CVSS vector string is not publicly available, but the high score suggests a relatively straightforward exploit requiring local access. The high score reflects the potential for significant impact including arbitrary code execution.
Possible Impact
Successful exploitation of CVE-2024-21923 can lead to severe consequences, including:
- Privilege Escalation: An attacker can gain administrative or system-level privileges on the affected machine.
- Arbitrary Code Execution: With elevated privileges, an attacker can execute arbitrary code, potentially installing malware, stealing sensitive data, or taking complete control of the system.
- System Compromise: The entire system can be compromised, leading to data breaches, service disruptions, and other malicious activities.
Mitigation and Patch Steps
AMD has released a security bulletin and likely a patch to address this vulnerability. To mitigate the risk, users of AMD StoreMI™ are strongly advised to take the following steps:
- Apply the Latest Patch: Download and install the latest version of AMD StoreMI™ from the official AMD website. This version should include the fix for CVE-2024-21923.
- Verify Permissions (Advanced Users): While the patch is the primary solution, technically inclined users may want to investigate the file system permissions under which StoreMI operates and compare against least-privilege best practices. However, *do not* make changes unless fully confident in your understanding of the StoreMI architecture. Incorrect changes could destabilize your system.
