CVE-2022-23011

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-25 · updated 2026-06-17
Weakness: CWE-682

Description

On certain hardware BIG-IP platforms, in version 15.1.x before 15.1.4 and 14.1.x before 14.1.3, virtual servers may stop responding while processing TCP traffic due to an issue in the SYN Cookie Protection feature. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

F5 BIG-IP APM: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
BIG-IP: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Big-Ip Analytics: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Networks, Inc. BIG-IP (AAM): from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
BIG-IP ASM: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 BIG-IP DNS: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Big-Ip Fraud Protection Service: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Big-Ip Global Traffic Manager: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Big-Ip Link Controller: from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 BIG-IP (LTM): from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4
F5 Networks, Inc. BIG-IP (PEM): from 14.1.0 before 14.1.3; from 15.1.0 before 15.1.4 — fixed in 14.1.3, 15.1.4

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 14.1.3, 15.1.4; BIG-IP 14.1.3, 15.1.4; F5 Big-Ip Analytics 14.1.3, 15.1.4; F5 Networks, Inc. BIG-IP (AAM) 14.1.3, 15.1.4; BIG-IP ASM 14.1.3, 15.1.4; F5 BIG-IP DNS 14.1.3, 15.1.4; F5 Big-Ip Fraud Protection Service 14.1.3, 15.1.4; F5 Big-Ip Global Traffic Manager 14.1.3, 15.1.4; F5 Big-Ip Link Controller 14.1.3, 15.1.4; F5 BIG-IP (LTM) 14.1.3, 15.1.4; F5 Networks, Inc. BIG-IP (PEM) 14.1.3, 15.1.4. Check the vendor advisory for mitigations.

References

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