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Information Disclosure in Gryphon Shepherd API

Low

Synopsis

A researcher at Tenable discovered an information disclosure in the API used by the Gryphon mobile app (https://shepherd-api.wegryphon.com:3000). An authenticated user could disclose the email of other customers, associated with their Gryphon device MAC address.

Proof of Concept:

Authenticated requests sent to https://shepherd-api.wegryphon.com:3000/rest/secondary-account-request/status-check/[MAC Address] would return the primary admin account email associated with a device if it had been synced with a customer's Gryphon mobile application.

Using this, an attacker could craft requests to brute force Gryphon MAC addresses and discover the customer email associated with each device.

Solution

Gryphon has fixed this issue. No further action is required.

Disclosure Timeline

11 April, 2022 - Tenable reports the issue to Gryphon
14 April, 2022 - Gryphon informs Tenable that the issue has been fixed

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

Tenable Advisory ID: TRA-2022-12
Credit:
Evan Grant
Affected Products:
Gryphon Shepherd API
Risk Factor:
Low

Advisory Timeline

14 April, 2022 - Advisory Released