Headline
CVE-2023-31125: Release 6.4.2 · socketio/engine.io
Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. An uncaught exception vulnerability was introduced in version 5.1.0 and included in version 4.1.0 of the socket.io parent package. Older versions are not impacted. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the engine.io package, including those who use depending packages like socket.io. This issue was fixed in version 6.4.2 of Engine.IO. There is no known workaround except upgrading to a safe version.
⚠️ 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:
TypeError: Cannot read properties of undefined (reading 'handlesUpgrades')
at Server.onWebSocket (build/server.js:515:67)
Please upgrade as soon as possible.
Bug Fixes
- include error handling for Express middlewares (#674) (9395782)
- prevent crash when provided with an invalid query param (fc480b4)
- typings: make clientsCount public (#675) (bd6d471)
- uws: prevent crash when using with middlewares (8b22162)
Credits
Huge thanks to @tyilo and @cieldeville for helping!
Links
- Diff: 6.4.1…6.4.2
- Client release: -
- ws version: ~8.11.0 (no change)
Related news
IBM Watson Knowledge Catalog on Cloud Pak for Data 4.0 could allow an authenticated user send a specially crafted request that could cause a denial of service. IBM X-Force ID: 251704.
### Impact A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. ``` TypeError: Cannot read properties of undefined (reading 'handlesUpgrades') at Server.onWebSocket (build/server.js:515:67) ``` This impacts all the users of the [`engine.io`](https://www.npmjs.com/package/engine.io) package, including those who uses depending packages like [`socket.io`](https://www.npmjs.com/package/socket.io). ### Patches A fix has been released today (2023/05/02): [6.4.2](https://github.com/socketio/engine.io/releases/tag/6.4.2) This bug was introduced in version 5.1.0 and included in version 4.1.0 of the `socket.io` parent package. Older versions are not impacted. For `socket.io` users: | Version range | `engine.io` version | Needs minor update? | |-----------------------------|---------------------|----------------------...