CVE-2022-34760 Denial of service in OPC UA Modicon Communication Module

High 7.5 Published 13 Jul 2022 Updated 17 Sep 2024

An infinite loop vulnerability in Schneider Electric communication modules allows attackers to cause a denial of service via improper cookie handling.

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-2022-34760?

CVE-2022-34760 is a high-severity denial of service 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-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability exists that could cause a denial of service of the webserver due to improper handling of the cookies. Affected Products: X80 advanced RTU Communication Module (BMENOR2200H) (V1.0), OPC UA Modicon Communication Module (BMENUA0100) (V1.10 and prior)

Weakness: CWE-835

Which versions are affected by CVE-2022-34760?

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-2022-34760?

No fix has been published for CVE-2022-34760 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-34760 being exploited?

There is no known exploitation of CVE-2022-34760 in the wild and no public exploit code.

Sources

Also known as GHSA-7425-c3x3-hhjq.