CVE-2021-27965 : What You Need to Know

This CVE-2021-27965 article provides details about a buffer overflow vulnerability in the MsIo64.sys driver present in MSI Dragon Center. The vulnerability could allow privilege escalation through specific IOCTL requests.

Understanding CVE-2021-27965

In this section, we will delve into what CVE-2021-27965 is, its impact, technical details, mitigation, and prevention strategies.

What is CVE-2021-27965?

The MsIo64.sys driver before version 1.1.19.1016 in MSI Dragon Center before version 2.0.98.0 contains a buffer overflow. This flaw enables threat actors to escalate privileges via crafted IOCTL requests.

The Impact of CVE-2021-27965

The vulnerability could lead to privilege escalation attacks, allowing unauthorized users to obtain elevated permissions within the affected system, compromising data integrity and system confidentiality.

Technical Details of CVE-2021-27965

Let's explore the technical specifics of CVE-2021-27965, including the vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

A buffer overflow in the MsIo64.sys driver in MSI Dragon Center allows attackers to execute arbitrary code and potentially take control of the affected system.

Affected Systems and Versions

MSI Dragon Center versions before 2.0.98.0 with the MsIo64.sys driver prior to 1.1.19.1016 are vulnerable to this exploit.

Exploitation Mechanism

By sending malicious IOCTL requests such as 0x80102040, 0x80102044, 0x80102050, or 0x80102054, threat actors can trigger the buffer overflow to escalate privileges.

Mitigation and Prevention

To safeguard your system from CVE-2021-27965, follow these mitigation and prevention strategies.

Immediate Steps to Take

Update MSI Dragon Center to version 2.0.98.0 or above to patch the vulnerability.
Monitor system logs for any suspicious activity indicating exploitation attempts.

Long-Term Security Practices

Regularly update software and firmware to eliminate known vulnerabilities.
Implement the principle of least privilege to restrict unnecessary permissions.

Patching and Updates

Stay informed about security updates from MSI and promptly apply patches to ensure your system's resilience against emerging threats.