search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Zizai Tech Nut contains multiple vulnerabilities

Vulnerability Note VU#402847

Original Release Date: 2016-10-25 | Last Revised: 2016-10-25


Zizai Tech Nut contains multiple vulnerabilities including sensitive information exposure and missing authentication.


CWE-313: Cleartext Storage in a File or on Disk - CVE-2016-6547

The Nut mobile app stores the account password used to authenticate to the cloud API in cleartext in the cache.db file.

CWE-200: Information Exposure - CVE-2016-6548
The Nut mobile app makes requests via HTTP instead of HTTPS. These requests contain the user's authenticated session token with the URL. An attacker can capture these requests and reuse the session token to gain full access the user's account.

CWE-306: Missing Authentication for Critical Function - CVE-2016-6549
The Nut device allows unauthenticated Bluetooth pairing, which enables unauthenticated connected applications to write data to the device name attribute.

The CVSS Score below represents CVE-2016-6548


These vulnerabilities may allow a remote attacker to track a user's location without their consent.


The CERT/CC is currently unaware of a practical solution to this problem.

Use with caution

Until the vendor supplies a patch, the user should practice caution as to where these devices are used.

Vendor Information


Zizai Tech Affected

Notified:  September 13, 2016 Updated: October 25, 2016



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
Temporal 6.8 E:ND/RL:ND/RC:ND
Environmental 1.7 CDP:ND/TD:L/CR:ND/IR:ND/AR:ND



Thanks to Deral Heiland and Adam Compton of Rapid7, Inc. for reporting this vulnerability.

This document was written by Trent Novelly.

Other Information

CVE IDs: CVE-2016-6547, CVE-2016-6548, CVE-2016-6549
Date Public: 2016-10-25
Date First Published: 2016-10-25
Date Last Updated: 2016-10-25 15:14 UTC
Document Revision: 24

Sponsored by CISA.