CVE-2019-16861 Explained : Impact and Mitigation

In Windows, versions up to 7.0.2 of the Code42 server have a vulnerability regarding an Untrusted Search Path. If a non-administrative attacker gains access to the local server, they can manipulate a dynamic-link library (DLL), which will be loaded and executed by the Code42 service. This could result in the execution of unauthorized code with elevated privileges on the local server.

Understanding CVE-2019-16861

What is CVE-2019-16861?

CVE-2019-16861 is a vulnerability in the Code42 server through version 7.0.2 for Windows, involving an Untrusted Search Path. It allows a non-administrative attacker to create or modify a DLL, which can be loaded and executed by the Code42 service, potentially leading to the execution of unauthorized code with elevated privileges.

The Impact of CVE-2019-16861

This vulnerability could result in an attacker executing arbitrary code with elevated privileges on the local server, compromising its security and integrity.

Technical Details of CVE-2019-16861

Vulnerability Description

In certain scenarios, a non-administrative attacker on the local server could manipulate a DLL, which the Code42 service might load at runtime, enabling the execution of unauthorized code at an elevated privilege level.

Affected Systems and Versions

Code42 server versions up to 7.0.2 for Windows

Exploitation Mechanism

The vulnerability allows a non-administrative attacker to create or modify a DLL, which, when loaded by the Code42 service, can execute unauthorized code with elevated privileges on the local server.

Mitigation and Prevention

Immediate Steps to Take

Update the Code42 server to a patched version that addresses the vulnerability.
Restrict access to the server to authorized personnel only.
Monitor for any unauthorized DLL modifications or executions.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent vulnerabilities.
Implement strong access controls and user permissions to limit unauthorized access.

Patching and Updates

Ensure that the Code42 server is regularly updated with the latest security patches to mitigate the CVE-2019-16861 vulnerability.