CVE-2022-36795: BIG-IP software SYN cookies vulnerability CVE-2022-36795

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-19 · updated 2026-06-17
Weakness: CWE-682

Description

In BIG-IP versions 17.0.x before 17.0.0.1, 16.1.x before 16.1.3.1, 15.1.x before 15.1.7, and 14.1.x before 14.1.5.1, when an LTM TCP profile with Auto Receive Window Enabled is configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing new client connections.

Affected products

F5 BIG-IP APM: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
BIG-IP: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Big-Ip Analytics: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Networks, Inc. BIG-IP (AAM): from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
BIG-IP ASM: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 through 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1
F5 BIG-IP DNS: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Big-Ip Fraud Protection Service: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Big-Ip Global Traffic Manager: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Big-Ip Link Controller: from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 BIG-IP (LTM): from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1
F5 Networks, Inc. BIG-IP (PEM): from 14.1.0 before 14.1.5.1; from 15.1.0 before 15.1.7; from 16.1.0 before 16.1.3.1; from 17.0.0 before 17.0.0.1 — fixed in 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; BIG-IP 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Big-Ip Analytics 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Networks, Inc. BIG-IP (AAM) 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; BIG-IP ASM 14.1.5.1, 15.1.7, 16.1.3.1; F5 BIG-IP DNS 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Big-Ip Fraud Protection Service 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Big-Ip Global Traffic Manager 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Big-Ip Link Controller 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 BIG-IP (LTM) 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1; F5 Networks, Inc. BIG-IP (PEM) 14.1.5.1, 15.1.7, 16.1.3.1, 17.0.0.1. Check the vendor advisory for mitigations.

References

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