Threats affecting pkg:npm/anephenix/hub

Hub is a Node.js WebSocket server and client with added features. Prior to 0.2.16, every incoming unauthenticated WebSocket connection triggers loadDefaultConnectionEventListeners to call requestClientId, which calls rpc.send for the get-client-id action and pushes a request into RPC.requests. The RPC.waitForReply function starts a setInterval polling loop every 10 milliseconds that is cleared only after a matching reply; if the client remains silent and closes, the timer and pending request stay allocated because the socket close path does not cancel them. Repeated connections therefore cause unbounded timers and heap entries, exhausting CPU and memory and making the server unavailable. This issue is fixed in version 0.2.16.

@anephenix/hub before version 0.2.16 contains an unauthenticated denial-of-service vulnerability. The server starts a polling loop via setInterval for every incoming WebSocket connection to request a client ID via RPC. If the client never responds, these intervals and pending requests are never cleaned up, even after the socket closes. An attacker can open many WebSocket connections and ignore server RPC messages, causing unbounded accumulation of timers and heap objects. This leads to CPU and memory exhaustion, resulting in denial of service.