CVE-2020-11957 - The Bluetooth Low Energy implementation in Cypress PSoC Creator BLE 4.2 component versions before 3.

CVE-2020-11957

Summary

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.

References

https://www.cypress.com/file/504466/download

Vulnerable Configurations

cpe:2.3:a:cypress:psoc_4.2_ble:*:*:*:*:*:*:*:*
cpe:2.3:a:cypress:psoc_4.2_ble:*:*:*:*:*:*:*:*

CVSS

Base:	5.4 (as of 22-06-2020 - 13:42)
Impact:
Exploitability:

CWE

CWE-331

CAPEC

Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Access

Vector	Complexity	Authentication
ADJACENT_NETWORK	MEDIUM	NONE

Impact

Confidentiality	Integrity	Availability
PARTIAL	PARTIAL	PARTIAL

cvss-vector via4

AV:A/AC:M/Au:N/C:P/I:P/A:P

refmap via4

confirm

https://www.cypress.com/file/504466/download

Last major update

22-06-2020 - 13:42

Published

09-06-2020 - 19:15

Last modified

22-06-2020 - 13:42