CVE-2022-34761 Null dereference in OPC UA Modicon Communication Module

High 7.5 Published 13 Jul 2022 Updated 16 Sep 2024

A null pointer dereference in Schneider Electric communication modules allows attackers to cause a denial of service by sending crafted JSON content.

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-2022-34761?

CVE-2022-34761 is a high-severity vulnerability in Schneider Electric OPC UA Modicon Communication Module, published on 13 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A CWE-476: NULL Pointer Dereference vulnerability exists that could cause a denial of service of the webserver when parsing JSON content type. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V2.01 and later), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)

Weakness: CWE-476

Which versions are affected by CVE-2022-34761?

It affects 2 products.

Products include Schneider-Electric Opc Ua Module for M580 Firmware, Schneider-Electric X80 Advanced Rtu Module Firmware.

How do I fix CVE-2022-34761?

No fix has been published for CVE-2022-34761 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-34761 being exploited?

There is no known exploitation of CVE-2022-34761 in the wild and no public exploit code.

Sources

Also known as GHSA-m9mx-49mx-whcc.