Management Interface Crash via Malformed JSON Request in Dbit WIFI4 N300

Executive Summary

The Dbit WIFI4 N300 1.0.0 devices have a vulnerability where the management interface can be crashed by sending a request from the local Wi-Fi network that omits the username or password field in the /api/login JSON request. This issue stems from a flaw in the device's JSON parser.

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Detection Guidance

This vulnerability can be detected by sending a malformed JSON request to the Dbit WIFI4 N300 1.0.0 management interface. Use tools like curl to send a request without the /api/login username or password field. Example command: curl -X POST http://<device-ip>/api/login -H "Content-Type: application/json" -d '{}'.

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Impact Analysis

This vulnerability could allow an attacker on the same local Wi-Fi network to crash the device's management interface, potentially causing a denial of service and disrupting network management functions.

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Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or other standards as it involves a denial-of-service condition on a local Wi-Fi management interface. No evidence suggests data exposure or privacy violations.

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Mitigation Strategies

Immediately update the Dbit WIFI4 N300 firmware to the latest version to fix the JSON parser error. Disable remote management access if not required and restrict Wi-Fi network access to trusted devices only.

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