Ensure Open5GS is updated to a version newer than 2.6.4 (such as version 2.7.0 or later), where this assertion logic has been hardened.
Monitor system logs for unexpected crashes related to the nas_eps_send_emm_to_esm function to identify potential exploitation attempts. CVE-2024-24429 Detail - NVD
Typically rated as high, as it impacts the availability of core mobile network functions. Technical Breakdown 24429mp4
Implement network-level filtering to ensure that NGAP traffic is only accepted from trusted, authorized network nodes (GNBs/Access Points).
Open5GS versions up to and including 2.6.4 Ensure Open5GS is updated to a version newer than 2
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.
An attacker can trigger this crash by sending a specially crafted NGAP packet (Next Generation Application Protocol) to the system. An attacker can trigger this crash by sending
When the system processes this malicious packet, it hits the failed assertion and shuts down. In a mobile network environment, this results in a Denial of Service , potentially cutting off connectivity for users serviced by that core. Recommendations
