CVE-2020-5854

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-06 · updated 2026-06-17

Description

On BIG-IP 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.6.0-11.6.5.1, the tmm crashes under certain circumstances when using the connector profile if a specific sequence of connections are made.

Affected products

F5 BIG-IP APM: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
BIG-IP: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Analytics: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Networks, Inc. BIG-IP (AAM): from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
BIG-IP ASM: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 BIG-IP DNS: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Edge Gateway: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Fraud Protection Service: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Global Traffic Manager: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Link Controller: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 BIG-IP (LTM): from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Networks, Inc. BIG-IP (PEM): from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 Big-Ip Webaccelerator: from 11.5.2 through 11.6.5; from 12.1.0 before 12.1.5.1; from 13.1.0 before 13.1.3.2; from 14.0.0 before 14.0.1.1; from 14.1.0 before 14.1.2.1; from 15.0.0 before 15.1.0 — fixed in 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1, 15.1.0
F5 BIG-IQ: from 5.1.0 through 5.4.0; from 6.0.0 through 6.1.0; 7.0.0
F5 Networks, Inc. Enterprise Manager: 3.1.1
F5 Networks, Inc. iWorkflow: 2.3.0
F5 Traffix SDC: from 5.0.0 through 5.1.0

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; BIG-IP 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Big-Ip Analytics 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Networks, Inc. BIG-IP (AAM) 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; BIG-IP ASM 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 BIG-IP DNS 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Big-Ip Edge Gateway 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Big-Ip Fraud Protection Service 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Big-Ip Global Traffic Manager 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Big-Ip Link Controller 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 BIG-IP (LTM) 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1; F5 Networks, Inc. BIG-IP (PEM) 12.1.5.1, 13.1.3.2, 14.0.1.1, 14.1.2.1. Check the vendor advisory for mitigations.

References

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