CVE-2021-32640

ReDoS in Sec-Websocket-Protocol header

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

ws es una biblioteca de servidor y cliente WebSocket de código abierto para Node.js. Un valor especialmente diseñado del encabezado "Sec-Websocket-Protocol" puede ser usado para ralentizar significativamente un servidor ws. La vulnerabilidad ha sido corregida en la versión ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). En las versiones vulnerables de ws, el problema puede ser mitigado al reducir la longitud máxima permitida de los encabezados de petición utilizando [`--max-http-header-size=size`](https://nodejs.org/api/cli.html#cli_max_http_header_size_size) y/o las opciones [`maxHeaderSize`](https://nodejs.org/api/http.html#http_http_createserver_options_requestlistener)

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-12 CVE Reserved
2021-05-25 CVE Published
2024-02-08 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (4)

URL	Tag	Source
https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E	Mailing List
https://security.netapp.com/advisory/ntap-20210706-0005	Third Party Advisory

URL	Date	SRC
https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693	2024-08-03

URL	Date	SRC
https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff	2023-11-07

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ws Project Search vendor "Ws Project"		Ws Search vendor "Ws Project" for product "Ws"				>= 5.0.0 < 6.2.2 Search vendor "Ws Project" for product "Ws" and version " >= 5.0.0 < 6.2.2"		node.js		Affected
Ws Project Search vendor "Ws Project"		Ws Search vendor "Ws Project" for product "Ws"				>= 7.0.0 < 7.4.6 Search vendor "Ws Project" for product "Ws" and version " >= 7.0.0 < 7.4.6"		node.js		Affected
Netapp Search vendor "Netapp"		E-series Performance Analyzer Search vendor "Netapp" for product "E-series Performance Analyzer"				-		-		Affected