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 - Medium Severity Vulnerability
Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
Library home page: https://registry.npmjs.org/ws/-/ws-5.2.2.tgz
Path to dependency file: /node_modules/ws/package.json
Path to vulnerable library: /node_modules/ws/package.json
Dependency Hierarchy: - jest-24.9.0.tgz (Root Library) - jest-cli-24.9.0.tgz - jest-config-24.9.0.tgz - jest-environment-jsdom-24.9.0.tgz - jsdom-11.12.0.tgz - :x: **ws-5.2.2.tgz** (Vulnerable Library)
Found in HEAD commit: 0c22b39b4f64e2bf88c2b59e4e09bc0b140c91e6
Found in base branch: develop
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.
Publish Date: 2021-05-25
URL: CVE-2021-32640
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: Low
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693
Release Date: 2021-05-25
Fix Resolution (ws): 5.2.3
Direct dependency fix Resolution (jest): 25.0.0