CVE-2024-31214: Traccar GPS Tracking System RCE Vulnerability

CVE-2024-31214 Overview

CVE-2024-31214 is a critical arbitrary file upload vulnerability affecting Traccar, an open source GPS tracking system. Versions 5.1 through 5.12 allow attackers to upload arbitrary files through the device image upload API with extensive control over file contents, storage directory, and file extension. This vulnerability can potentially lead to remote code execution, cross-site scripting (XSS), denial of service, and other severe security impacts.

Critical Impact

Attackers can upload malicious files anywhere on the file system with attacker-controlled content and extensions, potentially achieving remote code execution on systems running Traccar with default root/system privileges.

Affected Products

• Traccar GPS Tracking System versions 5.1 through 5.12
• Self-hosted Traccar installations with default configurations
• Traccar instances with self-registration enabled (default setting)

Discovery Timeline

• 2024-04-10 - CVE-2024-31214 published to NVD
• 2025-01-09 - Last updated in NVD database

Technical Details for CVE-2024-31214

Vulnerability Analysis

This vulnerability is classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). The flaw exists in the device image upload API endpoint, which fails to properly validate and restrict uploaded files. Attackers can exploit this weakness to upload files with arbitrary content and extensions to any location on the file system.

The severity of this vulnerability is significantly amplified by Traccar's default configuration settings. Self-registration is enabled by default, allowing any anonymous user to create an account and exploit this vulnerability without prior authentication. Additionally, the default installation runs with root/system privileges, granting uploaded files access to any filesystem location, including sensitive system directories.

Root Cause

The root cause lies in insufficient input validation within the device image upload functionality. The vulnerable code in DeviceResource.java does not properly sanitize or restrict the file path, file name, or file extension parameters submitted during the upload process. This allows attackers to manipulate these parameters to achieve path traversal and upload files with dangerous extensions such as .jsp, .php, or executable scripts.

The vulnerability is further detailed in the GitHub Device Resource Code and the Device model class.

Attack Vector

The attack is network-based and requires minimal user interaction. An attacker can exploit this vulnerability by:

1. Creating an account through self-registration (enabled by default)
2. Crafting a malicious HTTP request to the device image upload API
3. Manipulating the file path and extension parameters to write files outside the intended directory
4. Uploading web shells, backdoors, or other malicious payloads

While attackers cannot directly overwrite existing files, they can create new files with controlled names and extensions anywhere on the file system. On a default Traccar installation running as root, this can lead to immediate remote code execution by placing executable files in web-accessible directories or system startup locations.

For technical implementation details, refer to the GitHub Security Advisory.

Detection Methods for CVE-2024-31214

Indicators of Compromise

• Unexpected files appearing in system directories outside the Traccar application folder
• Web shell files (.jsp, .jspx, .war) in the Traccar web root or other web-accessible directories
• Unusual file creation activity in system startup directories or cron locations
• HTTP POST requests to the device image upload API with path traversal sequences (e.g., ../)

Detection Strategies

• Monitor HTTP logs for requests to /api/devices/*/image endpoints containing path traversal patterns
• Implement file integrity monitoring (FIM) on critical system directories to detect unauthorized file creation
• Analyze web server logs for suspicious file extension uploads through the Traccar API
• Deploy network-based detection rules to identify exploitation attempts targeting the device image upload endpoint

Monitoring Recommendations

• Enable verbose logging for the Traccar application to capture detailed API request information
• Configure SIEM alerts for file creation events by the Traccar process outside expected directories
• Monitor for new user account creation through self-registration that precedes suspicious upload activity
• Implement real-time alerting on any file write operations to sensitive system paths by the Traccar service

How to Mitigate CVE-2024-31214

Immediate Actions Required

• Upgrade Traccar to version 6.0 or later, which contains the security fix
• Disable self-registration immediately by setting registration.enable to false in the configuration
• Run Traccar with minimal privileges instead of root/system user
• Restrict network access to the Traccar instance using firewall rules

Patch Information

The vulnerability is addressed in Traccar version 6.0. The fix is available in commit 3fbdcd81566bc72e319ec05c77cf8a4120b87b8f. Organizations should prioritize upgrading to version 6.0 or apply the patch from this commit to earlier versions.

For additional details, consult the official GitHub Security Advisory (GHSA-3gxq-f2qj-c8v9).

Workarounds

• Disable self-registration by modifying the Traccar configuration to prevent anonymous account creation
• Place Traccar behind a reverse proxy with strict input validation and file upload restrictions
• Run Traccar as a non-privileged user to limit the impact of arbitrary file writes
• Implement network segmentation to restrict access to the Traccar instance from untrusted networks

# Configuration example - Disable self-registration in traccar.xml
# Add or modify this setting in your traccar.xml configuration file:
# <entry key='registration.enable'>false</entry>

# Run Traccar as a non-root user
# Create a dedicated service account:
useradd -r -s /bin/false traccar
chown -R traccar:traccar /opt/traccar
# Update systemd service file to run as traccar user