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-6.1.4.tgz
Path to dependency file: /E-voting-using-blockchain/evoting app/package.json
Path to vulnerable library: /evoting app/node_modules/ws/package.json
Dependency Hierarchy: - lite-server-2.4.0.tgz (Root Library) - browser-sync-2.26.5.tgz - browser-sync-ui-2.26.4.tgz - socket.io-client-2.2.0.tgz - engine.io-client-3.3.2.tgz - :x: **ws-6.1.4.tgz** (Vulnerable Library)
Found in HEAD commit: 3c02898f89d78283ce791eb1b53b2b5a667681ad
Found in base branch: master
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): 6.2.2
Direct dependency fix Resolution (lite-server): 2.5.0
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