UBUNTU-CVE-2021-32640

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UBUNTU-CVE-2021-32640

Summary:

Details: ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the `Sec-Websocket-Protocol` header can be used to significantly slow down a ws server. The vulnerability has been fixed in [email protected] (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) and/or the [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener) options.

References: https://ubuntu.com/security/CVE-2021-32640, https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693, https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff, https://www.cve.org/CVERecord?id=CVE-2021-32640