CVE-2023-22664: BIG-IP HTTP/2 profile vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-02-01 · updated 2026-06-17
Weakness: CWE-400

Description

On BIG-IP versions 17.0.x before 17.0.0.2 and 16.1.x before 16.1.3.3, and BIG-IP SPK starting in version 1.6.0, when a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

F5 BIG-IP APM: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
BIG-IP: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Big-Ip Analytics: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Networks, Inc. BIG-IP (AAM): from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
BIG-IP ASM: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Big-Ip Ddos Hybrid Defender: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 BIG-IP DNS: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Big-Ip Fraud Protection Service: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Big-Ip Link Controller: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 BIG-IP (LTM): from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Networks, Inc. BIG-IP (PEM): from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2
F5 Big-Ip Service Proxy: 1.6.0
F5 Big-Ip Ssl Orchestrator: from 16.1.0 before 16.1.3.3; from 17.0.0 before 17.0.0.2 — fixed in 16.1.3.3, 17.0.0.2

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 16.1.3.3, 17.0.0.2; BIG-IP 16.1.3.3, 17.0.0.2; F5 Big-Ip Analytics 16.1.3.3, 17.0.0.2; F5 Networks, Inc. BIG-IP (AAM) 16.1.3.3, 17.0.0.2; BIG-IP ASM 16.1.3.3, 17.0.0.2; F5 Big-Ip Ddos Hybrid Defender 16.1.3.3, 17.0.0.2; F5 BIG-IP DNS 16.1.3.3, 17.0.0.2; F5 Big-Ip Fraud Protection Service 16.1.3.3, 17.0.0.2; F5 Big-Ip Link Controller 16.1.3.3, 17.0.0.2; F5 BIG-IP (LTM) 16.1.3.3, 17.0.0.2; F5 Networks, Inc. BIG-IP (PEM) 16.1.3.3, 17.0.0.2; F5 Big-Ip Ssl Orchestrator 16.1.3.3, 17.0.0.2. Check the vendor advisory for mitigations.

References

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