Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for…
CERT-PL·CWE-261·Published 2026-03-16
Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for interface management and one for protecting all other server resources. When the latter is turned off (which is a default setting), an unauthenticated attacker on the local network can obtain usernames and encoded passwords for interface management portal by inspecting the HTTP response of the server when visiting the login page, which contains a JSON file with these details. Both normal and admin users credentials are exposed. This issue has been fixed in firmware versions: 1.36 (for tcPDU), 1.67 (for LK3.5 - hardware versions: 3.5, 3.6, 3.7 and 3.8), 1.75 (for LK3.9 - hardware version 3.9) and 1.38 (for LK4 - hardware version 4.0).
Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for interface management and one for protecting all other server resources. When the latter is turned off (which is a default setting), an unauthenticated attacker on the local network can obtain usernames and encoded passwords for interface management portal by inspecting the HTTP response of the server when visiting the login page, which contains a JSON file with these details. Both normal and admin users credentials are exposed. This issue has been fixed in firmware versions: 1.36 (for tcPDU), 1.67 (for LK3.5 - hardware versions: 3.5, 3.6, 3.7 and 3.8), 1.75 (for LK3.9 - hardware version 3.9) and 1.38 (for LK4 - hardware version 4.0).
Los dispositivos Tinycontrol como tcPDU y los controladores LAN LK3.5, LK3.9 y LK4 tienen dos mecanismos de autenticación separados: uno únicamente para la gestión de la interfaz y otro para proteger todos los demás recursos del servidor. Cuando este último está desactivado (lo cual es una configuración predeterminada), un atacante no autenticado en la red local puede obtener nombres de usuario y contraseñas codificadas para el portal de gestión de la interfaz al inspeccionar la respuesta HTTP del servidor cuando se visita la página de inicio de sesión, la cual contiene un archivo JSON con estos detalles. Las credenciales de usuarios normales y administradores quedan expuestas. Este problema ha sido solucionado en las versiones de firmware: 1.36 (para tcPDU), 1.67 (para LK3.5 - versiones de hardware: 3.5, 3.6, 3.7 y 3.8), 1.75 (para LK3.9 - versión de hardware 3.9) y 1.38 (para LK4 - versión de hardware 4.0).
| Version | Type | Source | Base | Exp | Impact | Vector |
|---|---|---|---|---|---|---|
| 4.0 | Primary | cve.org | 8.7 | — | — | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 4.0 | Secondary | NVD | 8.7 | — | — |
| CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |