CVE-2021-34147 is a denial-of-service vulnerability affecting the Bluetooth Classic implementation in Cypress WICED BT stack through 2.9.0 for CYW20735B1. An attacker within Bluetooth range can exploit this by sending a malformed LMP timing accuracy response and repeatedly reconnecting with a random BDAddress, exhausting device resources and causing a crash. This medium-severity vulnerability (CVSS 6.5) has an adjacent attack vector and low attack complexity, leading to high availability impact. While there is no public exploit code or active exploitation, the vulnerability has garnered significant community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.9.0CPE matchmatch criteria | cpe:2.3:o:cypress:wireless_internet_connectivity_for_embedded_devices:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.