CVE-2024-21849

BIG-IP Websockets vulnerability

At a glance

Severity: HIGH 7.5
EPSS: EPSS 0.52 % · percentile 44 (2026-10-27)
State: PUBLISHED
Published: 2024-02-14
Updated: 2024-08-01
Assigner: f5
NVD status: Analyzed

Description

When an Advanced WAF/ASM security policy and a Websockets profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	f5
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · f5sirt@f5.com (Secondary)
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-466

European references

ENISA EUVD · EUVD-2024-19460
GCVE · GCVE-0-2024-21849

CERT-FR advisories

CERTFR-2024-AVI-0137 — Multiples vulnérabilités dans les produits F5 · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* ≥ 16.1.0 < 16.1.4
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* ≥ 16.1.0 < 16.1.4

Affected products

Product	Versions
F5 · BIG-IP	unaffected 17.1.0 < * ; affected 16.1.0 < 16.1.4 ; unaffected 15.1.0 < *

References

https://my.f5.com/manage/s/article/K000135873

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD