CVE-2020-11957
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Low risk: more likely to be exploited than 32% of all known CVEs.
References
Related Vulnerabilities
Other CWE-331 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2008-1447 | Medium | 6.8 | 95% | - | Fix |
| CVE-2018-18326 | High | 7.5 | 54% | - | - |
| CVE-2018-15812 | High | 7.5 | 47% | - | - |
| CVE-2023-38357 | Medium | 5.3 | 5.3% | - | Fix |
| CVE-2015-3405 | High | 7.5 | 5.0% | - | Fix |
| CVE-2008-2108 | Critical | 9.8 | 4.3% | - | Fix |
Common questions
How do I fix CVE-2020-11957?
Upgrade psoc 4.2 ble to 3.64 or later.
Is CVE-2020-11957 being actively exploited?
Not that we know of. CVE-2020-11957 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.39% is the estimated probability that it will be exploited in the next 30 days. That is higher than 32% of all scored CVEs.
How severe is CVE-2020-11957?
CVE-2020-11957 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-11957 affect?
Published advisories record a fix for psoc 4.2 ble (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.