CVE-2021-20704 Memory corruption in CLUSTERPRO X

Critical 9.8 Published 2 Nov 2021 Updated 3 Aug 2024

A buffer overflow in NEC CLUSTERPRO X allows remote attackers to execute arbitrary code via the network.

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-2021-20704?

CVE-2021-20704 is a critical memory corruption vulnerability in NEC Corporation CLUSTERPRO X, published on 2 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Buffer overflow vulnerability in the compatible API with previous versions CLUSTERPRO X 4.3 for Windows and earlier, EXPRESSCLUSTER X 4.3 for Windows and earlier, CLUSTERPRO X 4.3 SingleServerSafe for Windows and earlier, EXPRESSCLUSTER X 4.3 SingleServerSafe for Windows and earlier allows attacker to remote code execution via a network.

Weakness: CWE-120

Which versions are affected by CVE-2021-20704?

It affects 4 products.

Products include Nec Clusterpro X, Nec Clusterpro X Singleserversafe, Nec Expresscluster X, Nec Expresscluster X Singleserversafe.

How do I fix CVE-2021-20704?

No fix has been published for CVE-2021-20704 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-2021-20704 being exploited?

There is no known exploitation of CVE-2021-20704 in the wild and no public exploit code.

Sources

Also known as GHSA-w89h-3579-rj7v.