Critical · published November 12, 2025
🔥 A single malformed NGAP message could crash the entire AMF process! Think of the AMF like a busy restaurant — if a server delivers a dish with too much spice, it can cause chaos in the kitchen. In this case, the overflow in free5gc is like that spicy dish overflowing onto the floor, causing staff to slip and the whole operation to come to a halt. An attacker could send a specially crafted message, triggering a buffer overflow that crashes the AMF process. This could lead to service disruptions, leaving users unable to connect. In a critical infrastructure setup, this could be absolutely devastating!
Think of the AMF like a busy restaurant — if a server delivers a dish with too much spice, it can cause chaos in the kitchen. In this case, the overflow in free5gc is like that spicy dish overflowing onto the floor, causing staff to slip and the whole operation to come to a halt. This vulnerability arises from insufficient validation of incoming NGAP messages, allowing an attacker to exploit the buffer overflow within the AMF process. When the system tries to handle an oversized message, it results in a crash, affecting availability.
An attacker could send a specially crafted message, triggering a buffer overflow that crashes the AMF process. This could lead to service disruptions, leaving users unable to connect. In a critical infrastructure setup, this could be absolutely devastating! To remediate this vulnerability, update free5gc to version 4.1.1 or later immediately. Ensure rigorous input validation is implemented for all incoming NGAP messages to prevent such crashes in the future. Regularly review system logs for any unusual activity related to message handling. You’ve got this! With these steps, you’ll secure your system and keep everything running smoothly! 🛡️