socket.io has an unhandled 'error' event

[sniffler-app]

Description

Impact

A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process.

node:events:502
    throw err; // Unhandled 'error' event
    ^

Error [ERR_UNHANDLED_ERROR]: Unhandled error. (undefined)
    at new NodeError (node:internal/errors:405:5)
    at Socket.emit (node:events:500:17)
    at /myapp/node_modules/socket.io/lib/socket.js:531:14
    at process.processTicksAndRejections (node:internal/process/task_queues:77:11) {
  code: 'ERR_UNHANDLED_ERROR',
  context: undefined
}

Affected versions

Version range	Needs minor update?
4.6.2...latest	Nothing to do
3.0.0...4.6.1	Please upgrade to [email protected] (at least)
2.3.0...2.5.0	Please upgrade to [email protected]

Patches

This issue is fixed by socketio/socket.io@15af22f, included in [email protected] (released in May 2023).

The fix was backported in the 2.x branch today: socketio/socket.io@d30630b

Workarounds

As a workaround for the affected versions of the socket.io package, you can attach a listener for the "error" event:

io.on("connection", (socket) => {
  socket.on("error", () => {
    // ...
  });
});

For more information

If you have any questions or comments about this advisory:

• Open a discussion here

Thanks a lot to Paul Taylor for the responsible disclosure.

References

• socketio/socket.io@15af22f
• socketio/socket.io@d30630b

Informations

Manifest Path: src/gallery-model-sync-socket/tests/example/package.json

Please look at dependabot report: https://github.com/swipely/yui3-gallery/security/dependabot/12