CVE Tools
Sign in

CVE-2021-34145

Published: Sep 7, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUNVD-CWE-noinfo
5.3MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 59.5%
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 devices does not properly handle the reception of LMP_max_slot with an invalid Baseband packet type (and LT_ADDRESS and LT_ADDR) after completion of the LMP setup procedure, allowing attackers in radio range to trigger a denial of service (firmware crash) via a crafted LMP packet.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:HPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:HAttack Complexity
High
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
commercial
wireless internet connectivity for embedded devicesEmbeddedFirmware
Hardware Firmware / network-adapter
Cypress Semiconductor Corporation
commercial·USaka cypress bluetooth sdk, cypress psoc4
Wireless Internet Connectivity for Embedded DevicesEmbedded
Hardware Firmware / cpu-gpu
and 1 more affected products View all →

Exploitability

Official Patch Available

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdf
dl.packetstormsecurity.net
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
and 1 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-34145 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows