CVE-2026-33062
HighSummary
free5GC to otwarte oprogramowanie dla rdzenia sieci 5G. W wersjach przed 1.4.2 usługa NRF ma podatność na niewłaściwą walidację danych wejściowych, co prowadzi do odmowy usługi. Funkcja `EncodeGroupId` nie weryfikuje długości danych, co może spowodować awarię usługi NRF.
Risk Assessment
Atakujący zdalnie może spowodować awarię usługi NRF, co prowadzi do całkowitej odmowy usługi dla tej usługi. Wszystkie wdrożenia free5GC korzystające z usługi odkrywania NRF są narażone.
Recommendation
Zaleca się zastosowanie poprawki w wersji 1.4.2 lub ograniczenie dostępu do API NRF tylko dla zaufanych źródeł. Nie ma bezpośredniego obejścia na poziomie aplikacji.
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Original NVD description (English source)
free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The `EncodeGroupId` function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters, the code panics with "index out of range". A remote attacker can cause the NRF service to panic and crash by sending a crafted HTTP GET request with a malformed `group-id-list` parameter. This results in complete denial of service for the NRF discovery service. free5GC NRF version 1.4.2 fixes the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch or restrict access to the NRF API to trusted sources only.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

