CVE-2021-23050 Cross-site request forgery in BIG-IP Advanced WAF and BIG-IP ASM; NGINX App Protect

High 7.5 Published 14 Sep 2021 Updated 3 Aug 2024

A CSRF-enabled policy on BIG-IP WAF/ASM allows an attacker to crash the bd process via a crafted HTML response, causing denial of service.

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-2021-23050?

CVE-2021-23050 is a high-severity vulnerability in F5 Big-Ip Advanced Web Application Firewall, published on 14 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP Advanced WAF and BIG-IP ASM version 16.0.x before 16.0.1.2 and 15.1.x before 15.1.3 and NGINX App Protect on all versions before 3.5.0, when a cross-site request forgery (CSRF)-enabled policy is configured on a virtual server, an undisclosed HTML response may cause the bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness: CWE-352

Which versions are affected by CVE-2021-23050?

It affects 3 products.

Products include F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Application Security Manager, F5 Nginx App Protect.

How do I fix CVE-2021-23050?

No fix has been published for CVE-2021-23050 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-23050 being exploited?

There is no known exploitation of CVE-2021-23050 in the wild and no public exploit code.

All F5 Big-Ip Advanced Web Application Firewall vulnerabilities

Sources

Also known as GHSA-rf2j-3ww5-qfxx.