github socketio/engine.io 5.2.1

latest releases: 6.6.0, 3.6.2, 6.5.5...
2 years ago

⚠️ This release contains an important security fix ⚠️

A malicious client could send a specially crafted HTTP request, triggering an uncaught exception and killing the Node.js process:

RangeError: Invalid WebSocket frame: RSV2 and RSV3 must be clear
at Receiver.getInfo (/.../node_modules/ws/lib/receiver.js:176:14)
at Receiver.startLoop (/.../node_modules/ws/lib/receiver.js:136:22)
at Receiver._write (/.../node_modules/ws/lib/receiver.js:83:10)
at writeOrBuffer (internal/streams/writable.js:358:12)

This bug was introduced by this commit, included in engine.io@4.0.0, so previous releases are not impacted.

Thanks to Marcus Wejderot from Mevisio for the responsible disclosure.

Bug Fixes

  • properly handle invalid data sent by a malicious websocket client (66f889f)

Links

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