CVE-2018-5531 Denial of service in BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)

High 7.4 Published 25 Jul 2018 Updated 17 Sep 2024

Adjacent network attackers can cause a denial of service on F5 BIG-IP VCMP guest and host systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-5531?

CVE-2018-5531 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 25 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Through undisclosed methods, on F5 BIG-IP 13.0.0-13.1.0.7, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.2.1-11.5.6, adjacent network attackers can cause a denial of service for VCMP guest and host systems. Attack must be sourced from adjacent network (layer 2).

Weakness: CWE-20

Which versions are affected by CVE-2018-5531?

It affects 13 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Domain Name System and 7 more.

How do I fix CVE-2018-5531?

No fix has been published for CVE-2018-5531 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-5531 being exploited?

There is no known exploitation of CVE-2018-5531 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-7mw4-4m54-jm62.