CVE-2019-11839 Memory corruption in n/a

Critical 9.8 Published 9 May 2019 Updated 4 Aug 2024

Heap-based buffer overflow in njs Array.prototype.push allows attackers to execute arbitrary code or cause 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-2019-11839?

CVE-2019-11839 is a critical memory corruption vulnerability in n/a, published on 9 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

njs through 0.3.1, used in NGINX, has a heap-based buffer overflow in Array.prototype.push after a resize, related to njs_array_prototype_push in njs/njs_array.c, because of njs_array_expand size mishandling.

Weakness: CWE-787

Which versions are affected by CVE-2019-11839?

It affects 1 product.

Products include F5 Njs.

How do I fix CVE-2019-11839?

No fix has been published for CVE-2019-11839 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-2019-11839 being exploited?

There is no known exploitation of CVE-2019-11839 in the wild and no public exploit code.

Sources

Also known as GHSA-585q-jwfj-chw8.