CVE-2017-18240 : What You Need to Know

CVE-2017-18240, published on March 19, 2018, highlights a vulnerability in the Gentoo app-admin/collectd package before version 5.7.2-r1. The issue allows local users to potentially terminate processes by manipulating the PID file directory ownership.

Understanding CVE-2017-18240

This CVE entry exposes a security flaw in the Gentoo app-admin/collectd package that could be exploited by local users to interfere with processes.

What is CVE-2017-18240?

The vulnerability in the Gentoo app-admin/collectd package, before version 5.7.2-r1, allows local users to manipulate the PID file directory ownership, potentially enabling them to terminate processes.

The Impact of CVE-2017-18240

The security flaw could be leveraged by local users to disrupt processes, posing a risk to system stability and potentially leading to service interruptions.

Technical Details of CVE-2017-18240

This section delves into the specific technical aspects of the CVE entry.

Vulnerability Description

Before version 5.7.2-r1, the ownership of the PID file directory in the Gentoo app-admin/collectd package is set to the collectd account. This misconfiguration could allow local users to terminate processes by modifying the PID file before a root script sends a SIGKILL signal to stop the service.

Affected Systems and Versions

Product: Gentoo app-admin/collectd
Versions affected: Before 5.7.2-r1

Exploitation Mechanism

The vulnerability arises from the incorrect ownership setting of the PID file directory, granting local users the ability to interfere with processes by manipulating the PID file.

Mitigation and Prevention

Protecting systems from CVE-2017-18240 involves immediate actions and long-term security practices.

Immediate Steps to Take

Upgrade to version 5.7.2-r1 or later of the Gentoo app-admin/collectd package.
Monitor and restrict access to the PID file directory to authorized users only.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights.
Regularly audit and review file permissions and ownership settings to prevent unauthorized modifications.

Patching and Updates

Ensure timely installation of security patches and updates to address known vulnerabilities and enhance system security.