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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2021-32640)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2021-32640)

ID	Name	Product	Family	Severity
258859	Linux Distros Unpatched Vulnerability : CVE-2021-32640	Nessus	Misc.	medium
411397	SCA: security update for ws (GHSA-6fc8-4gx4-v693)	Tenable Cloud Security	SCA Checks	medium
411397	SCA: security update for ws (GHSA-6fc8-4gx4-v693)	Tenable Self-Hosted Container Security	SCA Checks	medium

Detections

Analytics

CVE-2021-32640

medium

Tenable Plugins

medium

medium

medium