Vulnerability identifier: #VU48961

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7559

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PLC Simulator for EcoStruxure Control Expert
Other software / Other software solutions
EcoStruxure Control Expert
Server applications / SCADA systems

Vendor: Schneider Electric

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Modbus message-processing functionality. A remote unauthenticated attacker can send a specially crafted request, trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PLC Simulator for EcoStruxure Control Expert: 14.1

EcoStruxure Control Expert: All versions

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External links
http://www.se.com/ww/en/download/document/SEVD-2020-315-07
http://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1140

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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.