Out-of-bounds Write Vulnerability in Modicon PLC Controllers by Schneider Electric
CVE-2021-22791

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

An out-of-bounds write vulnerability exists in various Modicon PLC controllers and simulators from Schneider Electric, which could be exploited when a specially crafted project file is used to update controller applications. This flaw may enable an attacker to cause a Denial of Service, potentially disrupting PLC operations and affecting system stability. It is critical for users of the affected products to ensure they are applying relevant updates and implementing security best practices to safeguard their systems.

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

.