Sultan Khan
Technical Advisory – U-Boot – Unchecked Download Size and Direction in USB DFU (CVE-2022-2347)
Summary U-Boot is a popular and feature-rich bootloader for embedded systems. It includes optional support for the USB Device Firmware Update (DFU) protocol, which can be used by devices to download new firmware, or upload their current firmware. The U-Boot DFU implementation does not bound the length field in USB…
January 20, 2023
4 mins read
Technical Advisory – Kwikset/Weiser BLE Proximity Authentication in Kevo Smart Locks Vulnerable to Relay Attacks
Summary The Kwikset/Weiser Kevo line of smart locks support Bluetooth Low Energy (BLE) passive entry through their Touch-to-Open functionality. When a user touches the exterior portion of the lock, the lock checks that an authorized BLE device is exterior to and within a short distance of the smart lock, and…
May 15, 2022
5 mins read
Technical Advisory – Tesla BLE Phone-as-a-Key Passive Entry Vulnerable to Relay Attacks
Summary The Tesla Model 3 and Model Y employ a Bluetooth Low Energy (BLE) based passive entry system. This system allows users with an authorized mobile device or key fob within a short range of the vehicle to unlock and operate the vehicle, with no user interaction required on the…
May 15, 2022
4 mins read
Sniffle: A Sniffer for Bluetooth 5
Sniffle is the world’s first open source sniffer for Bluetooth 5. Sniffle also backwards compatible with Bluetooth 4.x LE. It is runs on Texas Instruments CC26x2 and CC1352 microcontrollers, including the low cost CC26x2R and CC1352R Launchpad development boards. The host side software for Sniffle is written in Python, enabling…