Implement network-level filtering to ensure that NGAP traffic is only accepted from trusted, authorized network nodes (GNBs/Access Points).
Typically rated as high, as it impacts the availability of core mobile network functions. Technical Breakdown 24429mp4
Open5GS versions up to and including 2.6.4 if it fails
The vulnerability stems from a "reachable assertion" within the nas_eps_send_emm_to_esm function. In software development, an assertion is a check that the code assumes to be true; if it fails, the program usually crashes immediately to prevent further errors. 24429mp4