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CVE-2019-9506

Blutooth BR/EDR specification does not specify sufficient encryption key length and allows an attacker to influence key length negotiation

Published: Aug 14, 2019Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-310
NVD MITRE
8.1CVSSHIGH
EPSS Score
2.7%
Top 16.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-310CWE-327

Affected Products

BR/EDRBluetooth
Windows 7 Service Pack 1Microsoft Corp
On-premOS
Operating Systems / windows
Windows 8.1Microsoft Corp
On-premOS
Operating Systems / windows
Windows Server 2012Microsoft Corp
On-premOS
Operating Systems / windows
Windows Server 2012 R2Microsoft Corp
On-premOS
Operating Systems / windows
bluetoothaka bluetooth core specification, mesh profile
microsoft corpcommercialUSOperating Systemsaka microsoft corporation
and 176 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://www.kb.cert.org/vuls/id/918987/
kb.cert.org
http://www.cs.ox.ac.uk/publications/publication12404-abstract.html
cs.ox.ac.uk
https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli
usenix.org
and 54 more references View all →

Timeline

Published
Aug 14, 2019
Last Updated
Nov 21, 2024

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