CVE-2021-22789: Buffer Overflow
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP and BMEH, all versions), Modicon M340 CPU (part numbers BMXP34, all versions), Modicon MC80 (part numbers BMKC80, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU, all versions), Modicon Premium CPU (part numbers TSXP5, all versions).
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2021-22789?
CVE-2021-22789 is a vulnerability that allows an attacker to cause a denial of service on the Modicon PLC controller / simulator.
What is the severity of CVE-2021-22789?
The severity of CVE-2021-22789 is medium, with a CVSS score of 6.5.
Which software is affected by CVE-2021-22789?
Schneider-electric Modicon M340 and Modicon M580 CPUs, as well as certain models of the Modicon Momentum, Premium, Quantum, and PLC Simulator for Ecostruxure Control Expert and Ecostruxure Process Expert, are affected by CVE-2021-22789.
How can I fix CVE-2021-22789?
To fix CVE-2021-22789, it is recommended to update the controller application with the latest version provided by Schneider Electric.
Where can I find more information about CVE-2021-22789?
You can find more information about CVE-2021-22789 at the following link: [Schneider Electric Security Advisory SEVD-2021-222-04](https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04)