CVE-2018-16561
HighCVSS 7.5Summary
Zidentyfikowano podatność w procesorach SIMATIC S7-300 (wszystkie wersje < V3.X.16), która polega na niewłaściwej walidacji pakietów komunikacyjnych S7. Może to prowadzić do stanu Denial-of-Service (DoS) procesora, który pozostanie w trybie DEFECT do momentu ręcznego restartu.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do utraty dostępności kluczowych funkcji procesora, co zagraża ciągłości działania systemu. Atakujący nie potrzebuje interakcji użytkownika ani uprawnień do przeprowadzenia ataku.
Recommendation
Zaleca się aktualizację procesorów SIMATIC S7-300 do wersji V3.X.16 lub nowszej oraz wdrożenie środków zaradczych dostarczonych przez firmę Siemens w celu zabezpieczenia systemu.
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Original NVD description (English source)
A vulnerability has been identified in SIMATIC S7-300 CPUs (All versions < V3.X.16). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. Successful exploitation requires an attacker to be able to send a specially crafted S7 communication packet to a communication interface of the CPU. This includes Ethernet, PROFIBUS, and Multi Point Interfaces (MPI). No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the core functionality of the CPU, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS