CVE-2018-7830 Other in Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200

High 7.5 Published 30 Nov 2018 Updated 5 Aug 2024

Attackers can cause a brief denial of service on Schneider Electric Modicon PLCs by sending crafted HTTP requests to the embedded web server.

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-2018-7830?

CVE-2018-7830 is a high-severity vulnerability in Schneider Electric SE Embedded Web Servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200, published on 30 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for ~1 minute by sending a specially crafted HTTP request.

Weakness: CWE-113

Which versions are affected by CVE-2018-7830?

It affects 4 products.

Products include Schneider-Electric Modicom Bmxnor0200h Firmware, Schneider-Electric Modicom M340 Firmware, Schneider-Electric Modicom Premium Firmware, Schneider-Electric Modicom Quantum Firmware.

How do I fix CVE-2018-7830?

No fix has been published for CVE-2018-7830 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-7830 being exploited?

There is no known exploitation of CVE-2018-7830 in the wild and no public exploit code.

Sources

Also known as GHSA-334h-jmqc-fx27.