CVE-2019-6686 Denial of service in BIG-IP
An attacker can cause the Traffic Management Microkernel to stop responding by exhausting diameter connection limits, leading to a denial of service.
- 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-2019-6686?
CVE-2019-6686 is a medium-severity denial of service vulnerability in F5 Big-Ip Local Traffic Manager, published on 23 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, the Traffic Management Microkernel (TMM) might stop responding after the total number of diameter connections and pending messages on a single virtual server has reached 32K.
Which versions are affected by CVE-2019-6686?
It affects 1 product.
Products include F5 Big-Ip Local Traffic Manager.
How do I fix CVE-2019-6686?
No fix has been published for CVE-2019-6686 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-2019-6686 being exploited?
There is no known exploitation of CVE-2019-6686 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Local Traffic Manager
Sources
Also known as GHSA-26hq-r45f-3pr8.