CVE-2018-5500 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 16 Sep 2024

Attackers can cause memory leaks and potential denial of service on F5 BIG-IP systems by establishing Multipath TCP connections when the feature is 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-2018-5500?

CVE-2018-5500 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

On F5 BIG-IP systems running 13.0.0, 12.1.0 - 12.1.3.1, or 11.6.1 - 11.6.2, every Multipath TCP (MCTCP) connection established leaks a small amount of memory. Virtual server using TCP profile with Multipath TCP (MCTCP) feature enabled will be affected by this issue.

Weakness: CWE-400

Which versions are affected by CVE-2018-5500?

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-2018-5500?

No fix has been published for CVE-2018-5500 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-2018-5500 being exploited?

There is no known exploitation of CVE-2018-5500 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-6jjh-35m4-xm42.