CVE-2020-0854 : Exploit Details and Defense Strategies

Windows Mobile Device Management (MDM) Diagnostics in Windows has an elevation of privilege vulnerability.

Understanding CVE-2020-0854

An elevation of privilege vulnerability in Windows Mobile Device Management (MDM) Diagnostics could allow attackers to escalate privileges on the affected system.

What is CVE-2020-0854?

The vulnerability arises from the improper handling of junctions within MDM Diagnostics in Windows.
It is also known as 'Windows Mobile Device Management Diagnostics Elevation of Privilege Vulnerability'.

The Impact of CVE-2020-0854

An attacker can exploit this vulnerability to gain elevated privileges on the target system, potentially leading to unauthorized actions.
Successful exploitation could result in the attacker taking control of the affected system.

Technical Details of CVE-2020-0854

Windows systems are affected by this vulnerability with specific versions and configurations being vulnerable.

Vulnerability Description

The vulnerability allows for an elevation of privilege, enabling attackers to gain higher system permissions.

Affected Systems and Versions

Windows: 10 Version 1809 for 32-bit, x64-based, and ARM64-based Systems.
Windows Server: 2019, 2019 (Core installation).
Windows 10 Version 1909 for 32-bit, x64-based, and ARM64-based Systems.
Windows Server, version 1909 (Server 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 the vulnerability by manipulating junctions in Windows Mobile Device Management (MDM) Diagnostics, leading to privilege escalation.

Mitigation and Prevention

To address CVE-2020-0854, users and administrators should take the following steps:

Immediate Steps to Take

Apply relevant security updates from Microsoft to patch the vulnerability.
Monitor for any signs of unauthorized access or system changes.

Long-Term Security Practices

Regularly update and patch all software and operating systems to prevent known vulnerabilities.
Implement least privilege access controls to limit the impact of potential breaches.

Patching and Updates

Install the latest security updates provided by Microsoft to mitigate the vulnerability and enhance system security.