CVE-2021-22659
HighCVSS 8.6Summary
MicroLogix 1400 w wersji 21.6 i niższej może pozwolić zdalnemu, nieautoryzowanemu atakującemu na wysłanie specjalnie skonstruowanego pakietu Modbus, co umożliwia atakującemu pobranie lub modyfikację losowych wartości w rejestrze. W przypadku udanego wykorzystania tej podatności może dojść do przepełnienia bufora, co prowadzi do stanu odmowy usługi.
Risk Assessment
Zagrożenie dla organizacji polega na możliwości zdalnego ataku, który może prowadzić do utraty komunikacji oraz konieczności ręcznego usunięcia błędu przez użytkownika, co wpływa na dostępność systemu.
Recommendation
Zaleca się aktualizację oprogramowania MicroLogix 1400 do wersji powyżej 21.6 oraz wdrożenie odpowiednich środków zabezpieczających, aby ograniczyć dostęp do urządzenia tylko dla autoryzowanych użytkowników.
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Original NVD description (English source)
Rockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

