CVE-2017-12763 : Security Advisory and Response

NoMachine versions earlier than 5.3.10 on Mac OS X and Linux are vulnerable to an elevation of privilege issue that allows authenticated users to gain unauthorized access to local files.

Understanding CVE-2017-12763

This CVE describes an undocumented server utility in NoMachine that can be exploited by authenticated users to elevate their privileges.

What is CVE-2017-12763?

NoMachine versions prior to 5.3.10 on Mac OS X and Linux contain a security vulnerability that enables authenticated users to access local files without proper authorization.

The Impact of CVE-2017-12763

The vulnerability allows users with authenticated access to exploit a server utility in NoMachine, potentially leading to unauthorized access to local files and elevated privileges.

Technical Details of CVE-2017-12763

NoMachine's security flaw can be further understood through the following technical details:

Vulnerability Description

An unspecified server utility in NoMachine versions before 5.3.10 on Mac OS X and Linux permits authenticated users to gain privileges by accessing local files.

Affected Systems and Versions

NoMachine versions earlier than 5.3.10 on Mac OS X and Linux

Exploitation Mechanism

Users with authenticated access can exploit the undocumented server utility to gain unauthorized access to local files and elevate their privileges.

Mitigation and Prevention

To address CVE-2017-12763, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade NoMachine to version 5.3.10 or later to eliminate the vulnerability
Restrict user access to sensitive files and directories

Long-Term Security Practices

Regularly monitor and audit user activities on the system
Implement the principle of least privilege to limit user access rights

Patching and Updates

Stay informed about security updates from NoMachine and promptly apply patches to secure the system