CVE-2019-7247 : Vulnerability Insights and Analysis

A vulnerability has been found in AODDriver2.sys, a component of AMD OverDrive, which exposes the wrmsr instruction through IOCTL 0x81112ee0 without adequately filtering the Model Specific Register (MSR). This oversight enables the ability to perform unauthorized MSR writes, potentially resulting in the execution of privileged Ring-0 code and privilege escalation.

Understanding CVE-2019-7247

An issue was discovered in AODDriver2.sys in AMD OverDrive. The vulnerable driver exposes a wrmsr instruction via IOCTL 0x81112ee0 and does not properly filter the Model Specific Register (MSR). Allowing arbitrary MSR writes can lead to Ring-0 code execution and escalation of privileges.

What is CVE-2019-7247?

Vulnerability found in AODDriver2.sys component of AMD OverDrive
Allows unauthorized MSR writes leading to privilege escalation

The Impact of CVE-2019-7247

Potential execution of privileged Ring-0 code
Risk of privilege escalation

Technical Details of CVE-2019-7247

The following technical details outline the specifics of the vulnerability:

Vulnerability Description

Exposes wrmsr instruction without proper MSR filtering
Allows unauthorized MSR writes

Affected Systems and Versions

Product: AMD OverDrive
Version: Not specified

Exploitation Mechanism

Exploiting IOCTL 0x81112ee0 to perform unauthorized MSR writes
Potential execution of Ring-0 code and privilege escalation

Mitigation and Prevention

To address CVE-2019-7247, consider the following mitigation strategies:

Immediate Steps to Take

Disable or remove the vulnerable driver
Implement least privilege access controls
Monitor and restrict IOCTL calls

Long-Term Security Practices

Regular security assessments and audits
Keep systems and software up to date
Educate users on safe computing practices

Patching and Updates

Apply patches or updates provided by the vendor