Denial of Service Vulnerability in Cypress Bluetooth Transceiver
CVE-2021-34146

6.5MEDIUM

Key Information:

Vendor

Cypress

Status
Cyw920735q60evb-01 Firmware
Vendor
CVE Published:
7 September 2021

What is CVE-2021-34146?

The Bluetooth Classic implementation in Cypress's CYW920735Q60EVB transceiver is susceptible to a denial of service attack due to improper handling of unsolicited LMP responses. Attackers within radio range can exploit this vulnerability by inundating the device with LMP_AU_Rand packets post-paging procedure, causing it to crash and restart. This impacts device availability and can disrupt normal operations.

References

https://www.cypress.com/documentation/datasheets/cyw20735...
x_refsource_MISC
https://dl.packetstormsecurity.net/papers/general/braktoo...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2021-34146 : Denial of Service Vulnerability in Cypress Bluetooth Transceiver