Is CVE-2021-32640 in the CISA KEV catalog?

No. CVE-2021-32640 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-32640?

CVE-2021-32640 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-32640?

CVE-2021-32640 has an EPSS score of 2.82% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-32640?

Upgrade node-ws on debian 11 to 7.4.2+~cs18.0.8-2 or later.

CVE & CISA-KEV Catalog

CVE-2021-32640

MEDIUMEPSS 85th pctl

5.3

CVSS v3

NVD

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 [email protected] (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` and/or the `maxHeaderSize` options.

CWE-400Resource Exhaustion

How to fix

Remediation Available

node-wsDebian

Fixed in:7.4.2+~cs18.0.8-2CVE-2021-32640

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

2.82%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch2

Third-Party Advisory1

security.netapp.com

Other references1

lists.apache.org

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

Embed a live status badge for CVE-2021-32640

Markdown

[![CVE-2021-32640](https://tridentstack.com/cve/badge/CVE-2021-32640.svg)](https://tridentstack.com/cve/CVE-2021-32640)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-32640"><img src="https://tridentstack.com/cve/badge/CVE-2021-32640.svg" alt="CVE-2021-32640"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.