CVE-2026-40248
HighSummary
free5GC to otwartoźródłowa implementacja rdzenia sieci 5G. W wersjach 4.2.1 i poniżej usługi UDR, obsługa tworzenia lub aktualizacji subskrypcji wpływu na ruch nie kończy wykonania po wysłaniu odpowiedzi HTTP 404, co pozwala na tworzenie lub nadpisywanie subskrypcji niezależnie od walidacji.
Risk Assessment
Nieautoryzowany atakujący z dostępem do interfejsu opartego na usługach 5G może tworzyć lub nadpisywać dowolne subskrypcje wpływu na ruch, co prowadzi do potencjalnego wstrzykiwania złośliwych wartości i narażenia na ataki.
Recommendation
Zaleca się aktualizację do najnowszej wersji oprogramowania, aby załatać tę podatność oraz monitorowanie dostępu do interfejsu 5G w celu wykrycia nieautoryzowanych działań.
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Original NVD description (English source)
free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for creating or updating Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription is created or overwritten regardless. An unauthenticated attacker with access to the 5G Service Based Interface can create or overwrite arbitrary Traffic Influence Subscriptions, including injecting attacker-controlled notificationUri values and arbitrary SUPIs, by supplying any value for the influenceId path segment. A patched version was not available at the time of publication.