CVE-2020-5881 Denial of service in BIG-IP VE

High 7.5 Published 30 Apr 2020 Updated 4 Aug 2024

Attackers can cause a denial of service in BIG-IP VE by triggering a lockup in the Network Device Abstraction Layer when VLAN groups and OSPF are configured.

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-2020-5881?

CVE-2020-5881 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 30 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On versions 15.0.0-15.1.0.1, 14.1.0-14.1.2.3, and 13.1.0-13.1.3.3, when the BIG-IP Virtual Edition (VE) is configured with VLAN groups and there are devices configured with OSPF connected to it, the Network Device Abstraction Layer (NDAL) Interfaces can lock up and in turn disrupting the communication between the mcpd and tmm processes.

Which versions are affected by CVE-2020-5881?

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-2020-5881?

No fix has been published for CVE-2020-5881 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-2020-5881 being exploited?

There is no known exploitation of CVE-2020-5881 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-9r2q-6jq7-9fj3.