CVE-2019-6605

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-28 · updated 2026-06-17

Description

On BIG-IP 11.5.1-11.5.8, 11.6.1-11.6.3, and 12.0.x, an undisclosed sequence of packets received by an SSL virtual server and processed by an associated Client SSL or Server SSL profile may cause a denial of service.

Affected products

F5 BIG-IP APM: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
BIG-IP: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Analytics: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Networks, Inc. BIG-IP (AAM): from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
BIG-IP ASM: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Edge Gateway: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Fraud Protection Service: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Global Traffic Manager: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Link Controller: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 BIG-IP (LTM): from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Networks, Inc. BIG-IP (PEM): from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Protocol Security Manager: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0
F5 Big-Ip Webaccelerator: from 11.5.0 before 11.5.9; from 11.6.0 before 11.6.4; from 12.0.0 before 12.1.0 — fixed in 11.5.9, 11.6.4, 12.1.0

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 11.5.9, 11.6.4, 12.1.0; BIG-IP 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Analytics 11.5.9, 11.6.4, 12.1.0; F5 Networks, Inc. BIG-IP (AAM) 11.5.9, 11.6.4, 12.1.0; BIG-IP ASM 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Edge Gateway 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Fraud Protection Service 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Global Traffic Manager 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Link Controller 11.5.9, 11.6.4, 12.1.0; F5 BIG-IP (LTM) 11.5.9, 11.6.4, 12.1.0; F5 Networks, Inc. BIG-IP (PEM) 11.5.9, 11.6.4, 12.1.0; F5 Big-Ip Protocol Security Manager 11.5.9, 11.6.4, 12.1.0. Check the vendor advisory for mitigations.

References

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