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cve[email protected]CVE-2021-34146
HistorySep 07, 2021 - 7:15 a.m.

CVE-2021-34146

2021-09-0707:15:07
web.nvd.nist.gov
23
cypress cyw920735q60evb
bluetooth classic
vulnerability
denial of service
nvd
cve-2021-34146

6.1 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

29.2%

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.

Affected configurations

NVD
Node
cypresscyw920735q60evb-01_firmwareMatch-
AND
cypresscyw920735q60evb-01Match-
Node
cypresscyw20735b1_firmwareMatch-
AND
cypresscyw20735b1Match-

6.1 Medium

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

29.2%