CVE-2019-1173 : Security Advisory and Response

A vulnerability known as 'Windows Elevation of Privilege Vulnerability' has been identified in the way PsmServiceExtHost.dll handles objects in memory. This CVE is distinct from several other related CVEs.

Understanding CVE-2019-1173

This CVE pertains to an elevation of privilege vulnerability in Windows systems.

What is CVE-2019-1173?

The vulnerability lies in the processing of objects in memory by PsmServiceExtHost.dll, potentially allowing attackers to elevate privileges on affected systems.

The Impact of CVE-2019-1173

The exploitation of this vulnerability could lead to unauthorized users gaining elevated privileges on the compromised Windows systems.

Technical Details of CVE-2019-1173

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability allows attackers to manipulate objects in memory, leading to an elevation of privilege.

Affected Systems and Versions

The following systems and versions are affected:

Windows 10 Version 1803 for 32-bit, x64-based, and ARM64-based Systems
Windows 10 Version 1809 for 32-bit, x64-based, and ARM64-based Systems
Windows Server versions 1803, 2019, and 2019 (Core installation)
Windows 10 Version 1903 for 32-bit, x64-based, and ARM64-based Systems
Windows Server, version 1903 (Server Core installation)

Exploitation Mechanism

Attackers can exploit this vulnerability by executing a specially crafted application to gain elevated privileges on the affected Windows systems.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-1173.

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft promptly.
Monitor for any unauthorized access or unusual system behavior.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights.
Regularly update and patch systems to address known vulnerabilities.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches from Microsoft to mitigate the CVE-2019-1173 vulnerability.