CVE-2022-21933 : Security Advisory and Response

A detailed overview of CVE-2022-21933, which involves an improper input validation vulnerability in ASUS VivoMini/Mini PCs that can be exploited by a local attacker to execute arbitrary code.

Understanding CVE-2022-21933

What is CVE-2022-21933?

ASUS VivoMini/Mini PC device has an improper input validation vulnerability. A local attacker with system privilege can use system management interrupt (SMI) to modify memory, resulting in arbitrary code execution for controlling the system or disrupting service.

The Impact of CVE-2022-21933

The vulnerability has a CVSS base score of 6.7 out of 10, with high impact on confidentiality, integrity, and availability. Attack complexity is low, but the attacker requires high privileges to exploit the vulnerability.

Technical Details of CVE-2022-21933

Vulnerability Description

The vulnerability allows a local attacker to exploit improper input validation in ASUS VivoMini/Mini PC devices using system management interrupt (SMI) to execute arbitrary code.

Affected Systems and Versions

The vulnerability affects various ASUS products including VC65-C1, PB60V, PB60G, PB60S, PA90, PB50, PB60, PB61V, TS10, PN40, PN60, PN30, and UN65U with specific version details.

Exploitation Mechanism

The attacker with system privilege can leverage SMI to modify memory, leading to arbitrary code execution, enabling them to control the system or disrupt services.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to update the BIOS of affected ASUS devices. Visit the ASUS Product Security Advisory for more information on BIOS updates.

Long-Term Security Practices

Implement strict access controls and least privilege principles to mitigate the risk of unauthorized access and execution of malicious code.

Patching and Updates

Regularly check for security updates and patches from ASUS to address known vulnerabilities and enhance the security posture of ASUS VivoMini/Mini PCs.