CVE-2024-24809: Traccar GPS Path Traversal Vulnerability

CVE-2024-24809 Overview

CVE-2024-24809 is a path traversal and unrestricted file upload vulnerability affecting Traccar, an open source GPS tracking system. Versions prior to 6.0 allow attackers with ordinary user permissions to upload files with the prefix device. to arbitrary folders on the server. Since Traccar allows user registration by default, attackers can easily acquire the necessary permissions to exploit this vulnerability.

Critical Impact

Attackers can leverage this vulnerability for phishing attacks, cross-site scripting (XSS), and potentially achieve arbitrary command execution on the server through malicious file uploads.

Affected Products

• Traccar GPS Tracking System versions prior to 6.0
• All installations with default registration enabled
• Systems allowing authenticated user file uploads

Discovery Timeline

• 2024-04-10 - CVE CVE-2024-24809 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-24809

Vulnerability Analysis

This vulnerability combines two dangerous weaknesses: path traversal (CWE-27) and unrestricted file upload with dangerous type. The flaw exists in Traccar's file handling mechanism which fails to properly validate and sanitize file paths during upload operations.

The vulnerability allows authenticated users to bypass intended directory restrictions and write files to arbitrary locations on the filesystem. Since Traccar permits user registration by default, the barrier to exploitation is extremely low—an attacker simply needs to create an account to gain the necessary permissions for exploitation.

The uploaded files are constrained to having a device. prefix, but this limitation does not significantly reduce the attack surface. Attackers can still upload malicious content such as HTML files containing JavaScript for XSS attacks, configuration files that could alter system behavior, or potentially executable scripts depending on server configuration.

Root Cause

The root cause of this vulnerability is improper input validation in the file upload functionality. The application fails to adequately sanitize user-supplied path components, allowing directory traversal sequences (such as ../) to escape the intended upload directory. Additionally, the system does not implement proper file type restrictions beyond the device. prefix requirement, enabling the upload of potentially dangerous file types.

Attack Vector

The attack vector is network-based, requiring only low-privilege access (a standard registered user account). An attacker can exploit this vulnerability remotely through the following general approach:

1. Register a new account on the target Traccar instance (leveraging default registration settings)
2. Authenticate to the application to obtain a valid session
3. Craft a malicious file upload request with path traversal sequences in the filename
4. The server processes the upload, placing the file in an unintended directory
5. Depending on the file location and content, the attacker can then leverage the uploaded file for XSS, phishing, or potentially command execution

The vulnerability requires no user interaction beyond the attacker's own actions, and it can affect resources beyond the vulnerable component's security scope.

Detection Methods for CVE-2024-24809

Indicators of Compromise

• Unexpected files with device. prefix appearing in directories outside the normal upload path
• Web server logs showing upload requests containing path traversal patterns (../, ..%2f, ..%5c)
• Files with suspicious extensions (.html, .js, .php, .jsp) in non-standard locations
• User registration spikes or accounts created solely for file upload activity

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns in upload requests
• Monitor file system changes in sensitive directories for unexpected file creation
• Review HTTP request logs for upload endpoints containing directory traversal sequences
• Audit newly registered user accounts for suspicious activity patterns following registration

Monitoring Recommendations

• Enable detailed logging for all file upload operations in Traccar
• Set up alerts for file creation events outside designated upload directories
• Monitor authentication logs for unusual registration patterns from suspicious IP ranges
• Implement file integrity monitoring on critical server directories

How to Mitigate CVE-2024-24809

Immediate Actions Required

• Upgrade Traccar to version 6.0 or later immediately
• Disable public user registration if not required for operations
• Audit the server filesystem for any unexpected files with device. prefix
• Review access logs for evidence of prior exploitation attempts

Patch Information

The vulnerability has been patched in Traccar version 6.0. The fix addresses both the path traversal issue and implements proper file type restrictions. Organizations should update to version 6.0 or later as soon as possible. The specific commit addressing this vulnerability can be found in the GitHub Commit Update. Additional details are available in the GitHub Security Advisory GHSA-vhrw-72f6-gwp5.

Workarounds

• Disable user registration by setting registration.enable to false in the Traccar configuration
• Implement network-level access controls to restrict who can reach the Traccar application
• Deploy a reverse proxy or WAF with rules to filter path traversal attempts
• Run Traccar with minimal filesystem permissions to limit the impact of successful exploitation

# Configuration example - Disable registration in traccar.xml
# Add or modify the following configuration option:
<entry key='registration.enable'>false</entry>

# Additionally, ensure Traccar runs with restricted permissions
# and audit upload directories regularly