## CVE-2021-32640 - Medium Severity Vulnerability

Vulnerable Libraries - ws-7.4.2.tgz, ws-6.2.1.tgz

ws-7.4.2.tgz

Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js

Library home page: https://registry.npmjs.org/ws/-/ws-7.4.2.tgz

Path to dependency file: Google-api-python-client/package.json

Path to vulnerable library: Google-api-python-client/node_modules/ws/package.json

Dependency Hierarchy: - puppeteer-8.0.0.tgz (Root Library) - :x: **ws-7.4.2.tgz** (Vulnerable Library)

ws-6.2.1.tgz

Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js

Library home page: https://registry.npmjs.org/ws/-/ws-6.2.1.tgz

Path to dependency file: Google-api-python-client/package.json

Path to vulnerable library: Google-api-python-client/node_modules/pa11y/node_modules/ws/package.json,Google-api-python-client/node_modules/pa11y-ci/node_modules/ws/package.json

Dependency Hierarchy: - pa11y-ci-2.4.0.tgz (Root Library) - puppeteer-1.20.0.tgz - :x: **ws-6.2.1.tgz** (Vulnerable Library)

Found in HEAD commit: f8f03aed50596222443692cbf2b69e91a97207ae

Found in base branch: main

Vulnerability 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 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

CVSS 3 Score Details (5.3)

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.

Suggested Fix

Type: Upgrade version

Origin: https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693

Release Date: 2021-05-25

Fix Resolution: ws - 7.4.6

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CVE-2021-32640 (Medium) detected in ws-7.4.2.tgz, ws-6.2.1.tgz - autoclosed #221

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