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Sloan Smart Faucet Unauthenticated BLE

Medium

Synopsis

There exists an unauthenticated BLE Interface in Sloan SmartFaucets including Optima EAF, Optima ETF/EBF, BASYS EFX, and Flushometers including SOLIS. The vulnerability allows for unauthenticated kinetic effects and information disclosure on the faucets. It is possible to use the Bluetooth Low Energy (BLE) connectivity to read and write to many BLE characteristics on the device. Some of these control the flow of water, the sensitivity of the sensors, and information about maintenance. Arbitrary BLE characteristics can be read and written commonly via Android/iOS applications (e.g. NRF Connect), Linux command line tools (e.g. gatttool), and more.

Proof of Concept

https://github.com/tenable/poc/blob/master/Sloan%20Smart%20Faucets/sloan_poc.py

Disclosure Timeline

04/01/2021 - Tenable discloses issue to Sloan support
04/16/2021 - Tenable follows up with Sloan support on issue
05/4/2021 - Tenable hears no response from Sloan. Discloses vulnerability details to CERT

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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.

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

Risk Information

CVE ID: CVE-2021-20107
Tenable Advisory ID: TRA-2021-26
Credit:
Ben Smith
CVSSv3 Base / Temporal Score:
5.3 / 5.3
CVSSv3 Vector:
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected Products:
Sloan SmartFaucets including Optima EAF, Optima ETF/EBF, BASYS EFX and Flushometers including SOLIS
Risk Factor:
Medium

Advisory Timeline

June 30, 2021 - Initial release