CVE-2026-41475
CriticalSummary
W bibliotece BACnet Stack przed wersją 1.4.3 występuje podatność na odczyt poza granicami bufora w dekoderze usługi WritePropertyMultiple. Atakujący zdalnie, bez uwierzytelnienia, mogą odczytać dane poza przydzielonymi granicami bufora, wysyłając skrócone żądanie WPM.
Risk Assessment
Podatność ta może prowadzić do awarii urządzeń wbudowanych BACnet lub ujawnienia informacji, co stwarza poważne zagrożenie dla bezpieczeństwa systemów korzystających z tego protokołu.
Recommendation
Zaleca się aktualizację biblioteki BACnet Stack do wersji 1.4.3 lub nowszej, aby usunąć tę podatność.
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Original NVD description (English source)
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an out-of-bounds read vulnerability in bacnet-stack's WritePropertyMultiple service decoder allows unauthenticated remote attackers to read past allocated buffer boundaries by sending a truncated WPM request. The vulnerability stems from wpm_decode_object_property() calling the deprecated decode_tag_number_and_value() function, which performs no bounds checking on the input buffer. A crafted BACnet/IP packet with a truncated property payload causes the decoder to read 1-7 bytes past the end of the buffer, leading to crashes or information disclosure on embedded BACnet devices. This vulnerability is fixed in 1.4.3.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS