CVE-2019-0986 Explained : Impact and Mitigation

A vulnerability known as the 'Windows User Profile Service Elevation of Privilege Vulnerability' has been identified in Windows due to symlinks mishandling by the Windows User Profile Service (ProfSvc).

Understanding CVE-2019-0986

What is CVE-2019-0986?

An elevation of privilege vulnerability exists in the Windows User Profile Service (ProfSvc) due to improper symlink handling.

The Impact of CVE-2019-0986

This vulnerability could allow an attacker to elevate privileges on the affected system, potentially leading to unauthorized access and control.

Technical Details of CVE-2019-0986

Vulnerability Description

The vulnerability arises from the mishandling of symlinks by the Windows User Profile Service (ProfSvc).

Affected Systems and Versions

Windows: Versions 7, 8.1, RT 8.1, 10, and various updates are affected.
Windows Server: Versions 2008, 2012, 2016, 2019, and related updates are impacted.
Windows 10 Version 1903 and Windows Server, version 1903 are also affected.

Exploitation Mechanism

The vulnerability can be exploited by an attacker to manipulate symlinks and gain elevated privileges on the system.

Mitigation and Prevention

Immediate Steps to Take

Apply security updates provided by Microsoft promptly.
Monitor for any unauthorized system access or changes.
Implement the principle of least privilege to restrict user permissions.

Long-Term Security Practices

Regularly update and patch systems to address known vulnerabilities.
Conduct security training for users to recognize and report suspicious activities.

Patching and Updates

Ensure all affected systems are updated with the latest security patches from Microsoft.