vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.
| CVE | CVE-2017-17671 |
|---|---|
| Severidad | CRITICAL |
| CVSS | 9.8 / 10 |
| EPSS | 3.1% en 30 días (percentil 87) |
| CWE | CWE-22 |
| Exposición (Shodan) | sin hosts expuestos detectados actualmente |
Productos afectados (catálogo NVD)
microsoft/windowsvbulletin/vbulletin
Técnica MITRE ATT&CK
T1083 – File and Directory Discovery
Mapeo automático best-effort por clase de vulnerabilidad (CWE) -- orientación, no certificación.