CVE-2020-5918 Denial of service in BIG-IP

High 7.5 Published 26 Aug 2020 Updated 4 Aug 2024

High-volume SCTP traffic can cause the Traffic Management Microkernel to stop responding, leading to a 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-2020-5918?

CVE-2020-5918 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 26 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, the Traffic Management Microkernel (TMM) may stop responding when processing Stream Control Transmission Protocol (SCTP) traffic when traffic volume is high. This vulnerability affects TMM by way of a virtual server configured with an SCTP profile.

Which versions are affected by CVE-2020-5918?

It affects 11 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 5 more.

How do I fix CVE-2020-5918?

No fix has been published for CVE-2020-5918 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-2020-5918 being exploited?

There is no known exploitation of CVE-2020-5918 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-qwpm-ppc7-2rrr.