CVE-2018-7760 Auth bypass in Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0201

Critical 9.8 Published 18 Apr 2018 Updated 5 Aug 2024

Malicious users can bypass authorization on Schneider Electric PLCs by sending requests to CGI functions, potentially gaining unauthorized access.

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-2018-7760?

CVE-2018-7760 is a critical authentication bypass vulnerability in Schneider Electric SE Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0201, published on 18 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An authorization bypass vulnerability exists in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200. Requests to CGI functions allow malicious users to bypass authorization.

Weakness: CWE-287

Which versions are affected by CVE-2018-7760?

It affects 57 products.

Products include Schneider-Electric 140cpu31110 Firmware, Schneider-Electric 140cpu31110c Firmware, Schneider-Electric 140cpu43412u Firmware, Schneider-Electric 140cpu43412uc Firmware, Schneider-Electric 140cpu65150 Firmware, Schneider-Electric 140cpu65150c Firmware and 51 more.

How do I fix CVE-2018-7760?

No fix has been published for CVE-2018-7760 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-7760 being exploited?

There is no known exploitation of CVE-2018-7760 in the wild and no public exploit code.

Sources

Also known as GHSA-34m8-w8w3-m7v4.