CVE-2020-16851 Explained : Impact and Mitigation

OneDrive for Windows Desktop application vulnerability allowing elevation of privilege.

Understanding CVE-2020-16851

An elevation of privilege vulnerability in OneDrive for Windows Desktop application allows attackers to overwrite files with elevated status.

What is CVE-2020-16851?

This CVE involves OneDrive for Windows mishandling symbolic links, enabling attackers to overwrite targeted files with elevated status.

The Impact of CVE-2020-16851

Attackers can exploit the vulnerability to delete specific files with elevated status.

Technical Details of CVE-2020-16851

OneDrive for Windows vulnerability details.

Vulnerability Description

Improper handling of symbolic links in OneDrive for Windows Desktop application.

Affected Systems and Versions

Vendor: Microsoft
Product: OneDrive for Windows
Affected Version: 0 (all versions less than publication)

Exploitation Mechanism

Attacker needs system access to exploit by running a crafted application to delete files.

Mitigation and Prevention

Protecting against CVE-2020-16851.

Immediate Steps to Take

Apply the provided update to correct the vulnerability.

Long-Term Security Practices

Regularly update OneDrive for Windows to prevent future vulnerabilities.
Avoid running unknown or untrusted applications.
Monitor file changes and access permissions.
Implement least privilege access controls.

Patching and Updates

Update OneDrive for Windows to the latest version to address the vulnerability.