CVE-2019-6647 Denial of service in BIG-IP

Medium 5.3 Published 4 Sep 2019 Updated 4 Aug 2024

Attackers with management interface access can cause memory depletion in MCPD, leading to denial of service on BIG-IP systems.

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-2019-6647?

CVE-2019-6647 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 4 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.2, 12.1.0-12.1.4.1, 11.5.2-11.6.4, when processing authentication attempts for control-plane users MCPD leaks a small amount of memory. Under rare conditions attackers with access to the management interface could eventually deplete memory on the system.

Weakness: CWE-401

Which versions are affected by CVE-2019-6647?

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-2019-6647?

No fix has been published for CVE-2019-6647 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-2019-6647 being exploited?

There is no known exploitation of CVE-2019-6647 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-85q7-j5xf-rwqq.