CVE-2023-33659 Memory corruption in n/a

High 7.5 Published 6 Jun 2023 Updated 8 Jan 2025

A heap buffer overflow in NanoMQ allows attackers to cause a denial of service via crafted MQTT packets.

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-2023-33659?

CVE-2023-33659 is a high-severity memory corruption vulnerability in n/a, published on 6 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A heap buffer overflow vulnerability exists in NanoMQ 0.17.2. The vulnerability can be triggered by calling the function nmq_subinfo_decode() in the file mqtt_parser.c. An attacker could exploit this vulnerability to cause a denial of service attack.

Weakness: CWE-787

Which versions are affected by CVE-2023-33659?

It affects 1 product.

Products include Emqx Nanomq.

How do I fix CVE-2023-33659?

No fix has been published for CVE-2023-33659 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-2023-33659 being exploited?

There is no known exploitation of CVE-2023-33659 in the wild and no public exploit code.

Sources

Also known as GHSA-mjw2-5qc5-7h27.