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CVE-2021-34147

Published: Sep 7, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUNVD-CWE-noinfo
6.5MEDIUM
NVD MITRE
EPSS Score
0.6%
Top 55.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 does not properly handle the reception of a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, allowing attackers to exhaust device BT resources and eventually trigger a crash via multiple attempts of sending a crafted LMP timing accuracy response followed by a sudden reconnection with a random BDAddress.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Cypress Semiconductor Corporation
commercial·USaka cypress psoc4, cypress bluetooth sdk
Wireless Internet Connectivity for Embedded DevicesEmbedded
Hardware Firmware / cpu-gpu
Qualcomm Technologies Inc.
commercial·USaka qualcomm technologies
Pocophone F1 (WCN3990)
Hardware Firmware
cypress
commercial
wireless internet connectivity for embedded devicesEmbeddedFirmware
Hardware Firmware / network-adapter
and 1 more affected products View all →

Exploitability

Official Patch Available

References

https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices
cypress.com
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
dl.packetstormsecurity.net
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
dl.packetstormsecurity.net
and 1 more references View all →

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