eQ-3 HomeMatic CCU3 firmware 3.41.11 allows session fixation. An attacker can create session IDs and send them to the victim. After the victim logs in to the session, the attacker can use that session. The attacker could create SSH logins after a valid session and easily compromise the system.
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
| Link | Tags |
|---|---|
| https://www.eq-3.com/products/homematic.html | vendor advisory |
| https://noskill1337.github.io/homematic-ccu3-session-fixation | exploit third party advisory mitigation |