Description
Traccar is an open source GPS tracking system. Traccar versions 5.1 through 5.12 allow arbitrary files to be uploaded through the device image upload API. Attackers have full control over the file contents, full control over the directory where the file is stored, full control over the file extension, and partial control over the file name. While it's not for an attacker to overwrite an existing file, an attacker can create new files with certain names and attacker-controlled extensions anywhere on the file system. This can potentially lead to remote code execution, XSS, DOS, etc. The default install of Traccar makes this vulnerability more severe. Self-registration is enabled by default, allowing anyone to create an account to exploit this vulnerability. Traccar also runs by default with root/system privileges, allowing files to be placed anywhere on the file system. Version 6.0 contains a fix for the issue. One may also turn off self-registration by default, as that would make most vulnerabilities in the application much harder to exploit by default and reduce the severity considerably.
EPSS Score:
68%
Comprehensive Technical Analysis of EUVD-2024-29114
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Overview: The vulnerability in Traccar, an open-source GPS tracking system, allows arbitrary file uploads through the device image upload API. This flaw affects versions 5.1 through 5.12. Attackers can control the file contents, directory, extension, and partially control the file name, potentially leading to remote code execution (RCE), cross-site scripting (XSS), and denial of service (DoS).
Severity Evaluation:
- CVSS Base Score: 9.7
- CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
The high base score indicates a critical vulnerability due to the following factors:
- Attack Vector (AV:N): Network-based attack, accessible remotely.
- Attack Complexity (AC:L): Low complexity required to exploit.
- Privileges Required (PR:N): No privileges required.
- User Interaction (UI:R): Requires user interaction, but this is often trivial to achieve.
- Scope (S:C): Changes the security scope, affecting other components.
- Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three CIA triad components.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Remote Code Execution (RCE): An attacker could upload a malicious script or executable file, which, when executed, could grant them control over the system.
- Cross-Site Scripting (XSS): By uploading a file with malicious JavaScript, an attacker could execute scripts in the context of a user's session.
- Denial of Service (DoS): Uploading large files or files designed to crash the system could lead to service disruption.
- Privilege Escalation: Given that Traccar runs with root/system privileges, an attacker could escalate their privileges to gain full control over the system.
Exploitation Methods:
- Self-Registration: By default, self-registration is enabled, allowing attackers to create accounts and exploit the vulnerability.
- File Upload API: The device image upload API does not properly validate file types, names, or contents, allowing attackers to upload malicious files.
3. Affected Systems and Software Versions
Affected Versions:
- Traccar versions 5.1 through 5.12
Fixed Version:
- Version 6.0 contains a fix for the issue.
4. Recommended Mitigation Strategies
- Upgrade to Version 6.0: Immediately upgrade to Traccar version 6.0, which includes the fix for this vulnerability.
- Disable Self-Registration: Turn off self-registration to prevent unauthorized account creation.
- Run with Least Privilege: Ensure Traccar is not running with root/system privileges. Use a dedicated, non-privileged user account.
- Implement Input Validation: Ensure that all file uploads are properly validated for type, size, and content.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant risk to organizations using Traccar for GPS tracking, particularly those in critical infrastructure sectors such as logistics, transportation, and emergency services. Given the widespread use of GPS tracking systems, the potential for large-scale disruption and data breaches is high. The European Union's emphasis on data protection and cybersecurity makes addressing this vulnerability a priority to maintain compliance with regulations such as GDPR.
6. Technical Details for Security Professionals
Vulnerability Details:
- File Upload API: The device image upload API in Traccar does not properly sanitize or validate file inputs, allowing attackers to upload arbitrary files.
- Default Configuration: The default installation settings, including self-registration and running with root privileges, exacerbate the vulnerability.
References:
- GitHub Advisory: GHSA-3gxq-f2qj-c8v9
- Commit Fix: 3fbdcd81566bc72e319ec05c77cf8a4120b87b8f
- Source Code References:
Mitigation Steps:
- Update Traccar: Ensure all instances are updated to version 6.0.
- Configuration Changes:
- Disable self-registration.
- Run Traccar with a non-privileged user account.
- Implement Security Best Practices:
- Regularly review and update security configurations.
- Monitor for suspicious activities and anomalies.
- Conduct thorough testing of file upload functionalities to ensure proper validation.
By addressing these points, organizations can significantly reduce the risk associated with this vulnerability and enhance their overall cybersecurity posture.