Vulnerability Details : 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.
Published 2020-06-09 19:15:10
Updated 2020-06-22 13:42:05
Source MITRE
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-11957

EPSS FAQ
0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 20 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-11957

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.4
 MEDIUM AV:A/AC:M/Au:N/C:P/I:P/A:P
5.5
6.4
 NIST
7.5
 HIGH CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
1.6
5.9
 NIST

CWE ids for CVE-2020-11957

  • The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-11957

Products affected by CVE-2020-11957

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