CVE-2018-18858 : Security Advisory and Response

Multiple local privilege escalation vulnerabilities have been identified in the LiquidVPN client version 1.37 for macOS, allowing unauthorized individuals to execute unrestricted OS commands with root privileges and potentially load harmful kernel extensions.

Understanding CVE-2018-18858

Several vulnerabilities have been discovered in the LiquidVPN client version 1.37 for macOS, which can lead to local privilege escalation.

What is CVE-2018-18858?

The vulnerability in the LiquidVPN client version 1.37 for macOS allows attackers to exploit an unprotected XPC service to execute arbitrary OS commands with root privileges. Additionally, there is a risk of loading a malicious kernel extension due to the way certain functions are executed.

The Impact of CVE-2018-18858

The exploitation of this vulnerability can result in unauthorized individuals gaining elevated privileges on the affected system, potentially leading to further compromise and control over the device.

Technical Details of CVE-2018-18858

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the com.smr.liquidvpn.OVPNHelper component using the system function to execute specific pathnames within shell commands, enabling attackers to run OS commands with root privileges.

Affected Systems and Versions

LiquidVPN client version 1.37 for macOS

Exploitation Mechanism

Attackers can communicate with the unprotected XPC service to execute arbitrary OS commands as root or potentially load a malicious kernel extension.

Mitigation and Prevention

Protecting systems from CVE-2018-18858 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable or uninstall the LiquidVPN client version 1.37 for macOS if possible
Monitor system logs for any suspicious activities
Implement least privilege access controls

Long-Term Security Practices

Regularly update software and apply security patches
Conduct security training and awareness programs for users
Employ endpoint protection solutions

Patching and Updates

Check for updates or patches provided by LiquidVPN to address the vulnerability