CVE-2020-19695 Memory corruption in n/a

Critical 9.8 Published 4 Apr 2023 Updated 14 Feb 2025

A buffer overflow in the Nginx NJS module allows remote attackers to execute arbitrary code via the njs_object_property parameter.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-19695?

CVE-2020-19695 is a critical memory corruption vulnerability in n/a, published on 4 Apr 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer Overflow found in Nginx NJS allows a remote attacker to execute arbitrary code via the njs_object_property parameter of the njs/njs_vm.c function.

Weakness: CWE-120

Which versions are affected by CVE-2020-19695?

It affects 1 product.

Products include F5 Njs.

How do I fix CVE-2020-19695?

Apply the vendor's patch.

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

Is CVE-2020-19695 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-19695 exists.

Sources

Also known as AZL-25994, GHSA-9m49-j2g8-82x8.