Unauthenticated NAS Payload Leading to Cell Service Disruption in Baicells Nova 430H

Executive Summary

This vulnerability affects Baicells Nova 430H devices. An attacker within radio range can send a malformed message during connection setup that contains an invalid payload. The device fails to validate this payload properly, causing it to forward the message to the core network. This triggers a shutdown of the signaling association for the cell, leading to temporary service disruption until connectivity is re-established.

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Detection Guidance

Detection may involve monitoring for malformed uplink messages during connection setup on Baicells Nova 430H devices. Check for unexpected signaling disruptions or shutdowns in the eNodeB logs. No specific commands are provided in the context.

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Impact Analysis

If you use Baicells Nova 430H devices, an attacker within radio range could exploit this to cause temporary loss of network service for your cell. This may result in interrupted communications or connectivity issues until the system recovers.

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Mitigation Strategies

Apply vendor patches or updates for Baicells Nova 430H to fix payload validation. Restrict unauthorized devices within radio range of the eNodeB. Monitor network traffic for malformed messages and review eNodeB logs for anomalies.

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