CVE-2017-18348 : Security Advisory and Response

In Splunk Enterprise 6.6.x, a vulnerability exists when configured to run as root but then switch to a designated non-root account, allowing local users to gain unauthorized access and potentially introduce malicious programs.

Understanding CVE-2017-18348

What is CVE-2017-18348?

This CVE refers to a vulnerability in Splunk Enterprise 6.6.x that enables local users to exploit access to a non-root account and manipulate critical files.

The Impact of CVE-2017-18348

The vulnerability allows unauthorized users to modify essential configuration files and potentially introduce malicious software into the system, compromising its integrity and security.

Technical Details of CVE-2017-18348

Vulnerability Description

The issue arises from incorrect instructions for setting up a non-root account in Splunk Enterprise 6.6.x, leading to inadequate access control and potential privilege escalation.

Affected Systems and Versions

Product: Splunk Enterprise 6.6.x
Vendor: Splunk
Versions: All versions within the 6.6.x range

Exploitation Mechanism

Local users can exploit the non-root account access to modify $SPLUNK_HOME/etc/splunk-launch.conf and introduce malicious programs into $SPLUNK_HOME/bin.

Mitigation and Prevention

Immediate Steps to Take

Avoid running Splunk Enterprise as the root user.
Ensure proper access controls and permissions are set for critical directories and files.
Regularly monitor and audit changes to system files and configurations.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights.
Conduct regular security training for system administrators and users to raise awareness of best practices.

Patching and Updates

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