CVE-2020-11957

https://notcve.org/view.php?id=CVE-2020-11957

The Bluetooth Low Energy implementation in Cypress PSoC Creator BLE 4.2 component versions before 3.64 generates a random number (Pairing Random) with significantly less entropy than the specified 128 bits during BLE pairing. This is the case for both authenticated and unauthenticated pairing with both LE Secure Connections as well as LE Legacy Pairing. A predictable or brute-forceable random number allows an attacker (in radio range) to perform a MITM attack during BLE pairing. La implementación de Bluetooth Low Energy en el componente Cypress PSoC Creator BLE 4.2 versiones anteriores a 3.64, genera un número aleatorio (Pairing Random) con significativamente menos entropía que los 128 bits especificados durante el emparejamiento BLE. Este es el caso tanto para el emparejamiento autenticado como para el autenticado con LE Secure Connections y LE Legacy Pairing. • https://www.cypress.com/file/504466/download • CWE-331: Insufficient Entropy •