Vulnerability · Published Sep 7, 2021 · Assigned by mitre
CVE-2021-34148
Medium 6.5
In plain English
A medium-severity security flaw in the bluez-firmware package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)0.6%top 51.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 a greater ACL Length 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | bluez-firmware | 1.2-8 | DEBIAN-CVE-2021-34148 |
| Debian:13 | bluez-firmware | 1.2-8 | DEBIAN-CVE-2021-34148 |
| Debian:14 | bluez-firmware | 1.2-8 | DEBIAN-CVE-2021-34148 |
| Ubuntu:22.04:LTS | bluez-firmware | no fix listed | UBUNTU-CVE-2021-34148 |