CVE-2022-34764 Memory corruption in OPC UA Modicon Communication Module

Medium 5.9 Published 13 Jul 2022 Updated 16 Sep 2024

A memory buffer overflow in Schneider Electric communication modules allows attackers to cause a denial of service by sending a malicious URL.

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-2022-34764?

CVE-2022-34764 is a medium-severity memory corruption 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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists that could cause denial of service when parsing the URL. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V1.0), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)

Weakness: CWE-119

Which versions are affected by CVE-2022-34764?

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-2022-34764?

No fix has been published for CVE-2022-34764 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-2022-34764 being exploited?

There is no known exploitation of CVE-2022-34764 in the wild and no public exploit code.

Sources

Also known as GHSA-w85p-v94g-r2xj.