CVE-2018-25224: PMS Buffer Overflow Vulnerability

CVE-2018-25224 Overview

CVE-2018-25224 is a stack-based buffer overflow vulnerability affecting PMS (Practical Music Search) version 0.42. This vulnerability allows local unauthenticated attackers to execute arbitrary code by supplying malicious values in the configuration file. Attackers can craft configuration files with oversized input that overflows the stack buffer and execute shell commands via return-oriented programming (ROP) gadgets.

Critical Impact

Local attackers can achieve arbitrary code execution through malicious configuration file manipulation, potentially leading to complete system compromise.

Affected Products

• Kimtore Practical Music Search version 0.42
• PMS (Practical Music Search) - all builds prior to security patch

Discovery Timeline

• 2026-03-28 - CVE CVE-2018-25224 published to NVD
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2018-25224

Vulnerability Analysis

This vulnerability exists in Practical Music Search (PMS) version 0.42, a console-based music browser and player. The application fails to properly validate the length of input values parsed from configuration files before copying them into fixed-size stack buffers. When a user opens PMS with a maliciously crafted configuration file, the oversized input exceeds the allocated buffer boundary, overwriting adjacent stack memory including the return address.

The local attack vector requires an attacker to either modify an existing configuration file or trick a user into using a malicious configuration. Once the buffer overflow occurs, attackers can leverage return-oriented programming (ROP) techniques to chain existing code gadgets within the application, ultimately achieving arbitrary code execution with the privileges of the user running PMS.

Root Cause

The root cause of this vulnerability is insufficient input validation when parsing configuration file values. The application uses unsafe string handling functions that do not enforce bounds checking, allowing oversized configuration values to overflow stack-allocated buffers. This represents a classic CWE-306 pattern combined with CWE-121 (Stack-based Buffer Overflow) characteristics.

Attack Vector

The attack requires local access to the system where PMS is installed. An attacker must craft a malicious configuration file containing oversized values designed to overflow the vulnerable buffer. When the victim launches PMS, the application parses the configuration file, triggering the buffer overflow. The attacker's payload overwrites the return address on the stack, redirecting execution flow to ROP gadgets that ultimately execute attacker-controlled shell commands.

The exploitation mechanism involves:

1. Identifying the vulnerable buffer size and offset to the return address
2. Crafting a payload with padding to reach the return address
3. Constructing a ROP chain using gadgets present in the PMS binary
4. Embedding shell commands to be executed upon successful exploitation

For technical details on the exploitation technique, refer to the Exploit-DB #44426 entry and the VulnCheck Advisory.

Detection Methods for CVE-2018-25224

Indicators of Compromise

• Unusually large PMS configuration files (significantly exceeding normal size)
• Modified configuration files in user home directories with suspicious binary content
• Unexpected process spawning from PMS parent process
• Crash logs or core dumps associated with PMS execution

Detection Strategies

• Monitor file integrity of PMS configuration files for unauthorized modifications
• Implement file system auditing on configuration directories to detect tampering
• Deploy endpoint detection rules to identify buffer overflow exploitation patterns
• Use application whitelisting to prevent unauthorized code execution from PMS context

Monitoring Recommendations

• Enable system call monitoring for execve calls originating from PMS processes
• Configure crash dump analysis to identify potential exploitation attempts
• Monitor for unusual child process creation from the PMS application
• Implement log aggregation for file modification events on configuration paths

How to Mitigate CVE-2018-25224

Immediate Actions Required

• Remove or disable PMS version 0.42 from all affected systems
• Audit existing PMS configuration files for suspicious or oversized content
• Restrict file system permissions on PMS configuration directories
• Consider migrating to alternative music search/player applications with active security support

Patch Information

This vulnerability affects PMS version 0.42. Users should check the PMS SourceForge Project for any available updates or security patches. Given the age of this vulnerability, the project may no longer be actively maintained. Organizations should evaluate whether continued use of this software is appropriate for their security posture.

Workarounds

• Set configuration files to read-only to prevent modification by attackers
• Run PMS in a sandboxed or containerized environment to limit impact of exploitation
• Implement strict file permission controls restricting configuration file write access to root/administrators only
• Use application control solutions to prevent unauthorized binaries from executing

# Configuration example - Restrict PMS configuration file permissions
chmod 444 ~/.config/pms/config
chown root:root ~/.config/pms/config

# Alternative: Run PMS in a restricted container
# This limits the impact of successful exploitation
firejail --private pms