Buffer Overflow Vulnerability in Modicon PLC Controllers by Schneider Electric
CVE-2021-22789

6.5MEDIUM

Key Information:

Vendor
Schneider Electric
Status
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)
Vendor
CVE Published:
2 September 2021

Summary

A vulnerability associated with improper memory boundary restrictions exists in various Modicon PLC controllers and simulators developed by Schneider Electric. This flaw can be exploited when a specially crafted project file is used to update the controller application, potentially leading to a Denial of Service condition. The affected products include multiple models of the Modicon PLC series as well as their associated simulators, affecting numerous deployment environments.

Affected Version(s)

Modicon M580 CPU (part numbers BMEP* and BMEH*, all ), Modicon M340 CPU (part numbers BMXP34*, all ), Modicon MC80 (part numbers BMKC80*, all ), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all ), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro (former name of EcoStruxureª Control Expert, all ), PLC Simulator for EcoStruxureª Process Expert including all HDCS (former name of EcoStruxureª Process Expert, all ), Modicon Quantum CPU (part numbers 140CPU*, all ), Modicon Premium CPU (part numbers TSXP5*, all ) 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)

References

https://download.schneider-electric.com/files?p_Doc_Ref=S...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.