#VU21491 Uncaught Exception in Schneider Electric Hardware solutions


Published: 2019-10-02

Vulnerability identifier: #VU21491

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2018-7857

CWE-ID: CWE-248

Exploitation vector: Network

Exploit availability: No

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

Vendor: Schneider Electric

Description
The vulnerability allows a remote attacker to cause a denial of service (DoS) condition on the target system.

The vulnerability exists due to uncaught exception vulnerability when writing out of bounds variables to the controller over Modbus. A remote attacker can cause a denial of service condition.

Note: A partial fix is available for this vulnerability on Modicon M580 firmware V2.80 and Modicon M340 firmware V3.01

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Modicon Quantum: All versions

Modicon Premium: All versions

Modicon M340: All versions

Modicon M580: 1.04 - 2.80

External links
http://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/
http://www.talosintelligence.com/vulnerability_reports/TALOS-2019-0768

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. However, proof of concept for this vulnerability is available.


Latest bulletins with this vulnerability


Multiple vulnerabilities in Schneider Electric Modicon Controllers