CVE-2020-11957 Weak cryptography in n/a
Insufficient entropy in BLE pairing random numbers allows attackers in radio range to perform man-in-the-middle attacks during pairing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-11957?
CVE-2020-11957 is a high-severity vulnerability in n/a, published on 9 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-331
Which versions are affected by CVE-2020-11957?
It affects 1 product.
Products include Cypress Psoc 4.2 Ble.
How do I fix CVE-2020-11957?
No fix has been published for CVE-2020-11957 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-11957 being exploited?
There is no known exploitation of CVE-2020-11957 in the wild and no public exploit code.
Sources
Also known as GHSA-5q94-jxwq-fqfx.