FortiGuard LabsFG-IR-19-224CVE-2019-9506 Encryption Key Negotiation of Bluetooth (KNOB) Vulnerability
8.1 High
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
4.8 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
38.9%
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.
| CPE | Name | Operator | Version |
|---|---|---|---|
| fortiswitch | eq | 6.2.7 | |
| fortiswitch | eq | 6.2.6 | |
| fortiswitch | eq | 6.2.5 | |
| fortiswitch | eq | 6.2.4 | |
| fortiswitch | eq | 6.2.3 | |
| fortiswitch | eq | 6.2.2 | |
| fortiswitch | eq | 6.0.7 | |
| fortiswitch | eq | 6.0.6 | |
| fortiswitch | eq | 6.0.5 |
Related
8.1 High
CVSS3
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
4.8 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
38.9%