CVE-2018-6623 : Security Advisory and Response

A vulnerability has been found in Hola version 1.79.859 where a user with limited privileges can alter or replace the executable file with malicious code, potentially leading to privilege escalation.

Understanding CVE-2018-6623

This CVE entry describes a security issue in Hola version 1.79.859 that allows unauthorized users to execute arbitrary code by manipulating executable files.

What is CVE-2018-6623?

The vulnerability in Hola version 1.79.859 enables a user with restricted privileges to modify the executable file, leading to potential privilege escalation upon service restart.

The Impact of CVE-2018-6623

The excessive access rights granted to the hola_svc and hola_updater services can result in unauthorized code execution and potential privilege escalation, depending on the service's user privileges.

Technical Details of CVE-2018-6623

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows an unprivileged user to replace the executable file with arbitrary code, which will be executed upon service restart, potentially leading to privilege escalation.

Affected Systems and Versions

Product: Hola
Version: 1.79.859

Exploitation Mechanism

The issue arises from the excessive access rights granted to the hola_svc and hola_updater services, specifically the SERVICE_ALL_ACCESS right.

Mitigation and Prevention

Protect your systems from CVE-2018-6623 with the following steps:

Immediate Steps to Take

Restrict access to executable files to authorized users only.
Regularly monitor and audit file changes and service restarts.

Long-Term Security Practices

Implement the principle of least privilege to limit user access rights.
Conduct regular security training for users to raise awareness of potential threats.

Patching and Updates

Apply patches or updates provided by the vendor to address the vulnerability and enhance system security.