#VU24372 Improper Check for Unusual or Exceptional Conditions

Published: 2020-01-17

Vulnerability identifier: #VU24372

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-6857


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Modicon M580
Hardware solutions / Firmware
Modicon M340
Hardware solutions / Firmware
Modicon Premium
Hardware solutions / Firmware
Modicon Quantum
Hardware solutions / Firmware

Vendor: Schneider Electric


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper check for unusual or exceptional conditions. A remote attacker can cause a denial of service condition in the controller when reading specific memory blocks using Modbus TCP.

Install updates from vendor's website.

Vulnerable software versions

Modicon M580: 1.04 - 2.50

Modicon M340: All versions

Modicon Premium: All versions

Modicon Quantum: All versions


External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability