CVE-2020-5935

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: 2020-10-29 · updated 2026-06-17

Description

On BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, FPS, GTM, Link Controller, PEM) versions 15.1.0-15.1.0.5, 14.1.0-14.1.2.3, and 13.1.0-13.1.3.3, when handling MQTT traffic through a BIG-IP virtual server associated with an MQTT profile and an iRule performing manipulations on that traffic, TMM may produce a core file.

Affected products

F5 BIG-IP APM: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
BIG-IP: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Big-Ip Analytics: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Networks, Inc. BIG-IP (AAM): from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
BIG-IP ASM: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 BIG-IP DNS: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Big-Ip Fraud Protection Service: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Big-Ip Global Traffic Manager: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Big-Ip Link Controller: from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 BIG-IP (LTM): from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1
F5 Networks, Inc. BIG-IP (PEM): from 13.1.0 before 13.1.3.4; from 14.1.0 before 14.1.2.4; from 15.0.0 before 15.1.1 — fixed in 13.1.3.4, 14.1.2.4, 15.1.1

How to fix

Upgrade to a fixed version: F5 BIG-IP APM 13.1.3.4, 14.1.2.4, 15.1.1; BIG-IP 13.1.3.4, 14.1.2.4, 15.1.1; F5 Big-Ip Analytics 13.1.3.4, 14.1.2.4, 15.1.1; F5 Networks, Inc. BIG-IP (AAM) 13.1.3.4, 14.1.2.4, 15.1.1; BIG-IP ASM 13.1.3.4, 14.1.2.4, 15.1.1; F5 BIG-IP DNS 13.1.3.4, 14.1.2.4, 15.1.1; F5 Big-Ip Fraud Protection Service 13.1.3.4, 14.1.2.4, 15.1.1; F5 Big-Ip Global Traffic Manager 13.1.3.4, 14.1.2.4, 15.1.1; F5 Big-Ip Link Controller 13.1.3.4, 14.1.2.4, 15.1.1; F5 BIG-IP (LTM) 13.1.3.4, 14.1.2.4, 15.1.1; F5 Networks, Inc. BIG-IP (PEM) 13.1.3.4, 14.1.2.4, 15.1.1. Check the vendor advisory for mitigations.

References

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