Ai3｜QbiCRMGateway - Willkürliches Lesen von Dateien durch Pfadüberspringung

The primary impact of CVE-2025-9639 is the potential for unauthorized access to sensitive system files. An attacker exploiting this vulnerability could download configuration files, source code, or other critical data. This could lead to further compromise of the system, including data exfiltration, privilege escalation, and denial of service. The lack of authentication required to exploit the vulnerability significantly increases the attack surface, making it accessible to a wide range of attackers. The ability to read arbitrary files makes this a high-risk vulnerability, as it bypasses standard access controls.

Organizations utilizing QbiCRMGateway in production environments, particularly those with publicly accessible instances or those lacking robust access controls, are at significant risk. Shared hosting environments where multiple users share the same server instance are also particularly vulnerable, as an attacker could potentially leverage this vulnerability to access data belonging to other users.

• linux / server:

journalctl -u qbicrmgateway -g 'file access' | grep '../'

• generic web:

curl -I 'http://your-qbicrmgateway-url/../../../../etc/passwd' # Check for 200 OK response

1. 2025-08-29Disclosure

   disclosure

1. Reserviert2025-08-29
2. Veröffentlicht2025-08-29
3. EPSS aktualisiert2026-03-23

While a patch is pending, several mitigation steps can be taken to reduce the risk posed by CVE-2025-9639. First, restrict file access permissions to the QbiCRMGateway application, limiting its ability to read files outside of its designated directories. Implement a Web Application Firewall (WAF) or proxy server to filter requests and block attempts to access unauthorized files. Regularly monitor system logs for suspicious activity, such as unusual file access patterns or requests containing path traversal sequences (e.g., '../'). Consider implementing input validation and sanitization to prevent malicious path manipulation. After applying these mitigations, verify their effectiveness by attempting to access restricted files.