CVE-2019-11867 : Vulnerability Insights and Analysis

Realtek NDIS driver rt640x64.sys, version 10.1.505.2015, lacks size verification on user input buffers, potentially allowing an attacker to exploit the system.

Understanding CVE-2019-11867

The vulnerability in the Realtek NDIS driver could be exploited by sending an IRP with a system buffer size of 0.

What is CVE-2019-11867?

The Realtek NDIS driver rt640x64.sys, version 10.1.505.2015, does not validate the size of input buffers from user space, assuming a minimum size of zero bytes.

The Impact of CVE-2019-11867

This vulnerability could be leveraged by an attacker to execute malicious activities on the affected system.

Technical Details of CVE-2019-11867

The technical aspects of the CVE-2019-11867 vulnerability are as follows:

Vulnerability Description

The Realtek NDIS driver rt640x64.sys fails to perform size verification on input buffers from user space, assuming a minimum size of zero bytes.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Not applicable

Exploitation Mechanism

To exploit this vulnerability, an attacker must send an IRP with a system buffer size of 0.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-11867:

Immediate Steps to Take

Implement security patches provided by Realtek promptly.
Monitor network traffic for any suspicious activities.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all system drivers.
Conduct security audits and vulnerability assessments periodically.

Patching and Updates

Apply the latest security updates and patches released by Realtek to address the vulnerability.