Vulnerability CVE-2019-9506
Published: 2019-08-14

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.

Type:

CWE-310

 (Cryptographic Issues)

CVSS2 => (AV:A/AC:L/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.8/10
4.9/10
6.5/10
Exploit range
Attack complexity
Authentication
Adjacent network
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Google -> Android 
Apple -> Iphone os 
Apple -> Mac os x 
Apple -> TVOS 
Apple -> Watchos 

 References:
http://seclists.org/fulldisclosure/2019/Aug/11
http://seclists.org/fulldisclosure/2019/Aug/13
http://seclists.org/fulldisclosure/2019/Aug/14
http://seclists.org/fulldisclosure/2019/Aug/15
http://www.cs.ox.ac.uk/publications/publication12404-abstract.html
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190828-01-knob-en
https://usn.ubuntu.com/4115-1/
https://usn.ubuntu.com/4118-1/
https://www.bluetooth.com/security/statement-key-negotiation-of-bluetooth/
https://www.kb.cert.org/vuls/id/918987/
https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli
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