Directory Traversal in Pronis Loisirs Billetterie CSE

Executive Summary

This is a Directory Traversal vulnerability in Pronis Loisirs Billetterie CSE software versions before 04/2026. It allows a remote attacker to access sensitive files like configuration files and SSH passwords by manipulating file paths in URLs. A proof of concept shows attackers can read system files such as /etc/passwd.

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Detection Guidance

To detect this Directory Traversal vulnerability in Pronis Loisirs Billetterie CSE software versions before 04/2026, you can test for path manipulation in URLs. Try accessing sensitive files like /etc/passwd or /etc/shadow by modifying the file path in the URL. For example, use a browser or curl to request a URL like 'http://target-site.com/vulnerable-endpoint?file=../../../../etc/passwd'. If the response contains system file contents, the vulnerability likely exists.

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Impact Analysis

An attacker could exploit this to steal sensitive data like passwords or configuration files, leading to unauthorized access. They might also execute arbitrary code on the affected system, potentially taking control of the software or server.

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Compliance Impact

This vulnerability could lead to data breaches, exposing personal or sensitive information. This may violate GDPR (if EU data is involved) or HIPAA (if healthcare data is compromised), potentially resulting in legal penalties, fines, or reputational damage.

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Mitigation Strategies

Immediately update the Pronis Loisirs Billetterie CSE software to the latest version released after April 2026. If an update is not available, restrict access to the vulnerable endpoint via network firewalls or web application firewalls. Disable directory traversal by implementing strict input validation for file paths in the application. Additionally, audit system files for unauthorized access and change all SSH passwords if they may have been exposed.

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