{"id":"DEBIAN-CVE-2021-34147","details":"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.","modified":"2026-09-01T20:04:30.428043442Z","published":"2021-09-07T07:15:07.373Z","upstream":["CVE-2021-34147"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-34147"}],"affected":[{"package":{"name":"bluez-firmware","ecosystem":"Debian:12","purl":"pkg:deb/debian/bluez-firmware?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2-8"}]}],"versions":["1.0-2","1.0-3","1.2-1","1.2-2","1.2-3","1.2-4","1.2-5","1.2-6","1.2-7","1.2-7~bpo11+1","1.2-8~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-34147.json"}},{"package":{"name":"bluez-firmware","ecosystem":"Debian:13","purl":"pkg:deb/debian/bluez-firmware?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2-8"}]}],"versions":["1.0-2","1.0-3","1.2-1","1.2-2","1.2-3","1.2-4","1.2-5","1.2-6","1.2-7","1.2-7~bpo11+1","1.2-8~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-34147.json"}},{"package":{"name":"bluez-firmware","ecosystem":"Debian:14","purl":"pkg:deb/debian/bluez-firmware?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2-8"}]}],"versions":["1.0-2","1.0-3","1.2-1","1.2-2","1.2-3","1.2-4","1.2-5","1.2-6","1.2-7","1.2-7~bpo11+1","1.2-8~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-34147.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}