CVE-2019-6667 Denial of service in BIG-IP

High 7.5 Published 27 Nov 2019 Updated 4 Aug 2024

Attackers can cause resource exhaustion and denial of service on F5 BIG-IP devices by sending traffic to Virtual Servers with the FIX profile enabled.

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-2019-6667?

CVE-2019-6667 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 27 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP 15.0.0-15.0.1, 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.1.0-13.1.1.5, 12.1.0-12.1.4.1, and 11.5.1-11.6.5, under certain conditions, TMM may consume excessive resources when processing traffic for a Virtual Server with the FIX (Financial Information eXchange) profile applied.

Weakness: CWE-400

Which versions are affected by CVE-2019-6667?

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-2019-6667?

No fix has been published for CVE-2019-6667 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-2019-6667 being exploited?

There is no known exploitation of CVE-2019-6667 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-gj76-9gq9-34xq.