CVE-2021-34146

The Bluetooth Classic implementation in the Cypress CYW920735Q60EVB does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and restart (crash) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 6.1 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

6.1^/10

CVSS v2.0 : MEDIUM

Vector : AV:A/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 6.5 / Impact : 6.9

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices	Vendor Advisory
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	Technical Description Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:cypress:cyw920735q60evb-01_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:cypress:cyw920735q60evb-01:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:cypress:cyw20735b1_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:cypress:cyw20735b1:-:*:*:*:*:*:*:*

Information

Published : 2021-09-07 00:15

Updated : 2021-09-14 07:56

NVD link : CVE-2021-34146

Mitre link : CVE-2021-34146

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

cypress

cyw20735b1_firmware
cyw920735q60evb-01
cyw920735q60evb-01_firmware
cyw20735b1

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