Stack-based buffer overflow in PLC Simulator for EcoStruxure Control Expert and EcoStruxure Control Expert - CVE-2020-7559

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Main Vulnerability Database Vulnerabilities #VU48961

Stack-based buffer overflow in PLC Simulator for EcoStruxure Control Expert and EcoStruxure Control Expert - CVE-2020-7559

Published: November 19, 2020 / Updated: December 14, 2020


Vulnerability identifier: #VU48961
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-7559
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Schneider Electric
Affected software:
PLC Simulator for EcoStruxure Control Expert
EcoStruxure Control Expert

Detailed vulnerability 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.


How to mitigate CVE-2020-7559

Install update from vendor's website.

Sources