Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cypress | Psoc 4.2 Ble | < 3.64 |
Related Weaknesses (CWE)
References
- https://www.cypress.com/file/504466/downloadProductVendor Advisory
- https://www.cypress.com/file/504466/downloadProductVendor Advisory
FAQ
What is CVE-2020-11957?
CVE-2020-11957 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2020-11957?
CVE-2020-11957 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-11957?
Check the references section above for vendor advisories and patch information. Affected products include: Cypress Psoc 4.2 Ble.