CVE-2018-7761 Code injection in Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0202

Critical 9.8 Published 18 Apr 2018 Updated 5 Aug 2024

A vulnerability in the HTTP request parser of Schneider Electric PLCs allows attackers to execute arbitrary code, posing a critical risk to industrial control systems.

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-2018-7761?

CVE-2018-7761 is a critical code injection vulnerability in Schneider Electric SE Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0202, published on 18 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability exists in the HTTP request parser in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200 which could allow arbitrary code execution.

Weakness: CWE-20

Which versions are affected by CVE-2018-7761?

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-2018-7761?

No fix has been published for CVE-2018-7761 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2018-7761 being exploited?

There is no known exploitation of CVE-2018-7761 in the wild and no public exploit code.

Sources

Also known as GHSA-7r26-7f6r-gjq2.