Vulnerability identifier: #VU21487

Vulnerability risk: High

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

CVE-ID: CVE-2018-7844

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to improper input validation. A remote attacker can gain unauthorized access to SNMP information when reading memory blocks from the controller over Modbus.

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: All versions

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External links
http://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/
http://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0739

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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.