CVE-2022-34759 Memory corruption in OPC UA Modicon Communication Module

High 7.5 Published 13 Jul 2022 Updated 16 Sep 2024

An out-of-bounds write vulnerability in Schneider Electric communication modules allows attackers to cause a denial of service via malicious HTTP headers.

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-2022-34759?

CVE-2022-34759 is a high-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-787: Out-of-bounds Write vulnerability exists that could cause a denial of service of the webserver due to improper parsing of the HTTP Headers. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V1.0), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)

Weakness: CWE-787

Which versions are affected by CVE-2022-34759?

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-2022-34759?

No fix has been published for CVE-2022-34759 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-2022-34759 being exploited?

There is no known exploitation of CVE-2022-34759 in the wild and no public exploit code.

Sources

Also known as GHSA-3wmv-phhj-q327.