CVE-2023-23555 BIG-IP Virtual Edition vulnerability

High 7.5 Published 1 Feb 2023 Updated 26 Mar 2025

Attackers can cause a denial of service by sending undisclosed traffic to a BIG-IP Virtual Edition configured with a FastL4 profile.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-23555?

CVE-2023-23555 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 1 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP Virtual Edition versions 15.1x beginning in 15.1.4 to before 15.1.8 and 14.1.x beginning in 14.1.5 to before 14.1.5.3, and BIG-IP SPK beginning in 1.5.0 to before 1.6.0, when FastL4 profile is configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-665

Which versions are affected by CVE-2023-23555?

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 Ddos Hybrid Defender and 7 more.

How do I fix CVE-2023-23555?

No fix has been published for CVE-2023-23555 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-2023-23555 being exploited?

There is no known exploitation of CVE-2023-23555 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-9hrr-866c-p39r.