VDB
CVE-2021-32640
CVE-2021-32640
PUBLISHED
CVSS 5.300000190734863 MEDIUM
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.
EPSS 2.82% · 86.1th percentile
Risk Scores
CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS Score
2.82%
86.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:18.04:LTS | node-ws | 1.1.0+ds1.e6ddaae4-3ubuntu1, 0, * |
| Ubuntu:16.04:LTS | node-ws | 0, 0.7.2+ds1.349b7460-1, 1.0.1+ds1.e6ddaae4-1 |
| Ubuntu:22.04:LTS | node-ws | 0, 7.4.2+~cs18.0.8-2, 7.5.5+~cs13.0.13-1 |
| Ubuntu:20.04:LTS | node-ws | 7.2.1-3, 7.2.1-2, 1.1.0+ds1.e6ddaae4-5 |
Timeline
- CVE Published
- May 26, 2021 EPSS Score
- Jul 29, 2021 EPSS Score
- Sep 28, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Jan 29, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Apr 12, 2022 PoC Published
- Jun 1, 2022 EPSS Score
- Aug 3, 2022 EPSS Score
- Dec 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-32640 third-party-advisory
- https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693 third-party-advisory
- https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-32640 third-party-advisory