CVE-2021-22973 Memory corruption in BIG-IP

High 7.5 Published 12 Feb 2021 Updated 3 Aug 2024

A memory corruption vulnerability in the BIG-IP JSON parser allows attackers to execute arbitrary code or cause a 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-2021-22973?

CVE-2021-22973 is a high-severity memory corruption vulnerability in F5 Big-Ip Access Policy Manager, published on 12 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.5, and all 12.1.x versions, JSON parser function does not protect against out-of-bounds memory accesses or writes. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Weakness: CWE-787

Which versions are affected by CVE-2021-22973?

It affects 10 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 4 more.

How do I fix CVE-2021-22973?

No fix has been published for CVE-2021-22973 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-22973 being exploited?

There is no known exploitation of CVE-2021-22973 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-r74w-522c-m89g.