CVE-2018-5537 Denial of service in BIG-IP (LTM, AAM, AFM, APM, ASM, Edge Gateway, GTM, PEM, WebAccelerator, WebSafe)

Medium 5.3 Published 25 Jul 2018 Updated 16 Sep 2024

Remote attackers can cause a denial of service by sending specially prepared HTML content to F5 BIG-IP systems configured with specific profiles.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2018-5537?

CVE-2018-5537 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 25 Jul 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A remote attacker may be able to disrupt services on F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.2.1-11.5.6 if the TMM virtual server is configured with a HTML or a Rewrite profile. TMM may restart while processing some specially prepared HTML content from the back end.

Weakness: CWE-20

Which versions are affected by CVE-2018-5537?

It affects 10 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Edge Gateway, F5 Big-Ip Global Traffic Manager and 4 more.

How do I fix CVE-2018-5537?

No fix has been published for CVE-2018-5537 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-2018-5537 being exploited?

There is no known exploitation of CVE-2018-5537 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-qm9v-23h5-wm7p.