CVE-2021-32640

描述

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 ws@7.4.6 (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.

如何修補 CVE-2021-32640

要修補 CVE-2021-32640,請將受影響套件升級到下列已修補版本。

• —升級至 7.4.6 或更新版本

CVE-2021-32640 正在被利用嗎?

低 — EPSS 為 2.8%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 7.0.0, < 7.4.6

CVSS 分數

參考連結(7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-32640
• PATCHgithub.com/websockets/ws
• WEBgithub.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff
• WEBgithub.com/websockets/ws/issues/1895
• WEB