CVE-2020-36400 Memory corruption in n/a

Critical 9.8 Published 1 Jul 2021 Updated 4 Aug 2024

A heap-based buffer overflow in ZeroMQ's TCP read function 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-2020-36400?

CVE-2020-36400 is a critical memory corruption vulnerability in n/a, published on 1 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021-20235.

Weakness: CWE-787

Which versions are affected by CVE-2020-36400?

It affects 1 product.

Products include Zeromq Libzmq.

How do I fix CVE-2020-36400?

No fix has been published for CVE-2020-36400 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-2020-36400 being exploited?

There is no known exploitation of CVE-2020-36400 in the wild and no public exploit code.

Sources

Also known as GHSA-fw28-qj4f-2jpx.