CVE-2021-22791
MediumSummary
Podatność CVE-2021-22791 dotyczy błędu zapisu poza granicami (CWE-787) w kontrolerach Modicon PLC, który może prowadzić do awarii usługi podczas aktualizacji aplikacji kontrolera za pomocą specjalnie przygotowanego pliku projektu. Dotyczy to różnych modeli kontrolerów Modicon M580, M340, MC80, Momentum oraz symulatorów PLC.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do przerwy w działaniu systemów kontrolnych, co może wpłynąć na ciągłość operacyjną organizacji. Może to również narazić systemy na inne ataki, jeśli kontrolery przestaną działać poprawnie.
Recommendation
Zaleca się aktualizację oprogramowania kontrolerów Modicon do najnowszych wersji, które eliminują tę podatność. Należy również monitorować i ograniczać dostęp do systemów, aby zminimalizować ryzyko wykorzystania tej luki.
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Original NVD description (English source)
A CWE-787: Out-of-bounds Write 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).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

