CVE-2021-32640
ReDoS in Sec-Websocket-Protocol header
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 25, 2021
- Updated
- Aug 3, 2024
- Reserved
- May 12, 2021
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | GitHub_M |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
wswebsockets |
|
References
- https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693
- https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff
- [tinkerpop-commits] 20210701 [tinkerpop] 01/03: Bumped ws to 6.2.2 to address CVE-2021-32640 CTRmailing-list
- https://security.netapp.com/advisory/ntap-20210706-0005/
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