CVE-2021-34147

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 48%
VendorProductVersion
cypresswireless_internet_connectivity_for_embedded_devices
𝑥
≤ 2.9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
bluez-firmware
bullseye/non-free
1.2-4
fixed
buster
not-affected
bookworm/non-free-firmware
1.2-9
fixed
bullseye
not-affected
trixie/non-free-firmware
1.2-11.1
fixed
sid/non-free-firmware
1.2-12
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
bluez-firmware
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
focal
dne
bionic
dne
xenial
ignored
trusty
ignored