An Improper Input Validation vulnerability exists in the user websocket handler of MAAS. An authenticated, unprivileged attacker can intercept a user.update websocket request and inject the is_superuser property set to true. The server improperly validates this input, allowing the attacker to self-promote to an administrator role. This results in full administrative control over the MAAS deployment.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Maas | Canonical | 3.3.0 (including) | 3.3.11 (excluding) |
| Maas | Canonical | 3.4.0 (including) | 3.4.9 (excluding) |
| Maas | Canonical | 3.5.0 (including) | 3.5.9 (excluding) |
| Maas | Canonical | 3.6.0 (including) | 3.6.2 (excluding) |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html