CVE-2022-23011 Denial of service in BIG-IP

High 7.5 Published 25 Jan 2022 Updated 3 Aug 2024

Attackers can cause virtual servers to stop responding to TCP traffic on specific F5 BIG-IP hardware when SYN Cookie Protection 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-2022-23011?

CVE-2022-23011 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 25 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On certain hardware BIG-IP platforms, in version 15.1.x before 15.1.4 and 14.1.x before 14.1.3, virtual servers may stop responding while processing TCP traffic due to an issue in the SYN Cookie Protection feature. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-682

Which versions are affected by CVE-2022-23011?

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-2022-23011?

No fix has been published for CVE-2022-23011 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-2022-23011 being exploited?

There is no known exploitation of CVE-2022-23011 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-hjwv-27qh-x9j5.