CVE-2020-24347 Memory corruption in n/a

Medium 5.5 Published 13 Aug 2020 Updated 4 Aug 2024

An out-of-bounds read in the njs JavaScript engine used by NGINX can lead to crashes or information disclosure.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2020-24347?

CVE-2020-24347 is a medium-severity memory corruption vulnerability in n/a, published on 13 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

njs through 0.4.3, used in NGINX, has an out-of-bounds read in njs_lvlhsh_level_find in njs_lvlhsh.c.

Weakness: CWE-125

Which versions are affected by CVE-2020-24347?

It affects 1 product.

Products include F5 Njs.

How do I fix CVE-2020-24347?

Upgrade to a fixed version.

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

Is CVE-2020-24347 being exploited?

There is no known exploitation of CVE-2020-24347 in the wild and no public exploit code.

Sources

Also known as AZL-35029, GHSA-88pj-43x4-vj4q.