CVE-2018-5501 Denial of service in BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, GTM, Link Controller, PEM, WebAccelerator, WebSafe

Medium 5.9 Published 1 Mar 2018 Updated 17 Sep 2024

Attackers can cause excessive buffering and denial of service on F5 BIG-IP systems via TCP DNS profile due to lack of flow control.

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-2018-5501?

CVE-2018-5501 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 1 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In some circumstances, on F5 BIG-IP systems running 13.0.0, 12.1.0 - 12.1.3.1, any 11.6.x or 11.5.x release, or 11.2.1, TCP DNS profile allows excessive buffering due to lack of flow control.

Weakness: CWE-400

Which versions are affected by CVE-2018-5501?

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 Dns and 7 more.

How do I fix CVE-2018-5501?

No fix has been published for CVE-2018-5501 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-2018-5501 being exploited?

There is no known exploitation of CVE-2018-5501 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-297q-7r2m-g586.