VULNERABILITY INTELLIGENCE
CVE-2019-9506
CVSS score8.1 HIGH
EPSS probability2.69%
CISA KEVNot currently listed
Published2019-08-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Description
The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.
Weakness classification
- CWE-327: Use of a Broken or Risky Cryptographic Algorithm
Primary references
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Mailing List, Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory
- cret@cert.org — Third Party Advisory