CVE-2018-7759 Memory corruption in Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0200

High 7.5 Published 18 Apr 2018 Updated 5 Aug 2024

A buffer overflow in Schneider Electric PLCs allows attackers to execute arbitrary code or cause denial of service via crafted input.

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-2018-7759?

CVE-2018-7759 is a high-severity memory corruption vulnerability in Schneider Electric SE Modicon M340, Modicon Premium, Modicon Quantum, BMXNOR0200, 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 buffer overflow vulnerability exists in Schneider Electric's Modicon M340, Modicon Premium, Modicon Quantum PLC, BMXNOR0200. The buffer overflow vulnerability is caused by the length of the source string specified (instead of the buffer size) as the number of bytes to be copied.

Weakness: CWE-119

Which versions are affected by CVE-2018-7759?

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-2018-7759?

No fix has been published for CVE-2018-7759 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-2018-7759 being exploited?

There is no known exploitation of CVE-2018-7759 in the wild and no public exploit code.

Sources

Also known as GHSA-fx7r-97wv-3rg8.