CVE-2022-26372 Denial of service in BIG-IP

High 7.5 Published 5 May 2022 Updated 16 Sep 2024

Attackers can cause memory exhaustion and denial of service on F5 BIG-IP devices by sending specific requests to DNS listeners with queueing 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-2022-26372?

CVE-2022-26372 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 5 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On F5 BIG-IP 15.1.x versions prior to 15.1.0.2, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all versions of 12.1.x and 11.6.x, when a DNS listener is configured on a virtual server with DNS queueing (default), undisclosed requests can cause an increase in memory resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-400

Which versions are affected by CVE-2022-26372?

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-2022-26372?

No fix has been published for CVE-2022-26372 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-2022-26372 being exploited?

There is no known exploitation of CVE-2022-26372 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-5rx5-7749-xvmp.