CVE-2019-7240 : What You Need to Know

A vulnerability has been identified in the version 1.83 of Moo0 System Monitor, specifically in the WinRing0x64.sys driver, allowing unauthorized code execution with escalated privileges.

Understanding CVE-2019-7240

This CVE involves a flaw in the WinRing0x64.sys driver of Moo0 System Monitor version 1.83, potentially leading to privilege escalation.

What is CVE-2019-7240?

CVE-2019-7240 is a vulnerability in Moo0 System Monitor version 1.83, where the WinRing0x64.sys driver exposes a wrmsr instruction through IOCTL 0x9C402088, enabling unauthorized writes to the Model Specific Register (MSR).

The Impact of CVE-2019-7240

The vulnerability allows attackers to execute code with Ring-0 privileges, leading to the escalation of privileges on the affected system.

Technical Details of CVE-2019-7240

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The WinRing0x64.sys driver in Moo0 System Monitor version 1.83 exposes a flaw where the wrmsr instruction is accessible through IOCTL 0x9C402088, without proper filtering of the Model Specific Register (MSR).

Affected Systems and Versions

Product: Moo0 System Monitor
Version: 1.83

Exploitation Mechanism

Unauthorized writes to the MSR can potentially allow for the execution of code with Ring-0 privileges, enabling privilege escalation.

Mitigation and Prevention

To address CVE-2019-7240, follow these mitigation strategies:

Immediate Steps to Take

Disable or remove the affected Moo0 System Monitor version 1.83.
Monitor for any unusual system behavior or unauthorized access.

Long-Term Security Practices

Regularly update software and drivers to the latest versions.
Implement least privilege access controls to limit potential damage from privilege escalation.

Patching and Updates

Apply patches or updates provided by the vendor to fix the vulnerability and enhance system security.