National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-9506 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 8.1 HIGH
Vector: AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N (V3.0 legend)
Impact Score: 5.2
Exploitability Score: 2.8


Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.8 MEDIUM
Vector: (AV:A/AC:L/Au:N/C:P/I:P/A:N) (V2 legend)
Impact Subscore: 4.9
Exploitability Subscore: 6.5


Access Vector (AV): Local_Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2019/Aug/11 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/13 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/14 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2019/Aug/15 Mailing List Third Party Advisory
http://www.cs.ox.ac.uk/publications/publication12404-abstract.html Third Party Advisory
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190828-01-knob-en
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html
https://usn.ubuntu.com/4115-1/
https://usn.ubuntu.com/4118-1/
https://www.bluetooth.com/security/statement-key-negotiation-of-bluetooth/ Third Party Advisory
https://www.kb.cert.org/vuls/id/918987/ Third Party Advisory US Government Resource
https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli Third Party Advisory

Technical Details

Vulnerability Type (View All)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
     Show Matching CPE(s)
Running on/with
 cpe:2.3:h:blackberry:blackberry:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:apple:iphone_os:12.4:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:apple:mac_os_x:10.12.6:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:apple:mac_os_x:10.13.6:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:apple:mac_os_x:10.14.5:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:apple:tvos:12.4:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:apple:watchos:5.3:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9506
NVD Published Date:
08/14/2019
NVD Last Modified:
08/28/2019