Ella Core panics on malformed NGAP Location Report

Summary

Ella Core panics when processing a malformed NGAP LocationReport message with ue-presence-in-area-of-interest event type and omitting the optional UEPresenceInAreaOfInterestList IE.

Impact

An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.

Fix

Added IE presence verification to NGAP message handling.