CVE-2018-7242 Weak cryptography in Modicon Premium, Modicon Quantum, Modicon M340, BMXNOR0200

Critical 9.8 Published 18 Apr 2018 Updated 5 Aug 2024

Weak password hashing in Schneider Electric Modicon controllers allows attackers to bypass authentication via hash collision attacks.

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-2018-7242?

CVE-2018-7242 is a critical vulnerability in Schneider Electric SE Modicon Premium, Modicon Quantum, Modicon M340, 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

Vulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the communication modules. The algorithm used to encrypt the password is vulnerable to hash collision attacks.

Weakness: CWE-326

Which versions are affected by CVE-2018-7242?

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-2018-7242?

No fix has been published for CVE-2018-7242 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-7242 being exploited?

There is no known exploitation of CVE-2018-7242 in the wild and no public exploit code.

Sources

Also known as GHSA-4cgj-crgg-xwgf.