CVE-2019-1476 Explained : Impact and Mitigation

A vulnerability known as the Windows Elevation of Privilege Vulnerability arises from the mishandling of hard links by the Windows AppX Deployment Service (AppXSVC). It should be noted that this vulnerability, with the CVE ID mentioned, is distinct from CVE-2019-1483.

Understanding CVE-2019-1476

What is CVE-2019-1476?

An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1483.

The Impact of CVE-2019-1476

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

Technical Details of CVE-2019-1476

Vulnerability Description

The vulnerability stems from the mishandling of hard links by the Windows AppX Deployment Service (AppXSVC), creating a security risk for affected systems.

Affected Systems and Versions

Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for x64-based Systems
Windows Server, version 1909 (Server Core installation)
Windows 10 Version 1803, 1809, 1709, and 1607 for various systems
Windows Server versions 1803, 2019, and 2016
Windows 10 Version 1903 for 32-bit, x64-based, and ARM64-based Systems
Windows Server, version 1903 (Server Core installation)

Exploitation Mechanism

The vulnerability is exploited by manipulating hard links through the Windows AppX Deployment Service, allowing attackers to gain elevated privileges.

Mitigation and Prevention

Immediate Steps to Take

Apply security updates provided by Microsoft promptly.
Monitor official sources for patches and advisories.
Implement the principle of least privilege to restrict access.

Long-Term Security Practices

Regularly update and patch systems to address known vulnerabilities.
Conduct security assessments and audits to identify and mitigate risks.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches from Microsoft to mitigate the Windows Elevation of Privilege Vulnerability.