In VOS user session identifier (authentication token) is issued to the browser prior to authentication but is not changed after the user successfully logs into the application. Failing to issue a new session ID following a successful login introduces the possibility for an attacker to set up a trap session on the device the victim is likely to login with.
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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Versa_operating_system | Versa-networks | * | 16.1r2s11 (excluding) |
| Versa_operating_system | Versa-networks | 20.2.0 (including) | 20.2.2 (excluding) |
| Versa_operating_system | Versa-networks | 21.1.0 (including) | 21.1.1 (excluding) |
Such a scenario is commonly observed when: