CVE-2020-24346 Use after free in n/a

High 7.8 Published 13 Aug 2020 Updated 4 Aug 2024

A use-after-free vulnerability in the njs JavaScript engine allows attackers to potentially execute arbitrary code or cause a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2020-24346?

CVE-2020-24346 is a high-severity use after free vulnerability in n/a, published on 13 Aug 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

njs through 0.4.3, used in NGINX, has a use-after-free in njs_json_parse_iterator_call in njs_json.c.

Weakness: CWE-416

Which versions are affected by CVE-2020-24346?

It affects 1 product.

Products include F5 Njs.

How do I fix CVE-2020-24346?

No fix has been published for CVE-2020-24346 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-24346 being exploited?

There is no known exploitation of CVE-2020-24346 in the wild and no public exploit code.

Sources

Also known as GHSA-2wvg-h2ww-x862.