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CVE-2021-43400

Published: 4 November 2021

An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.

Priority

Medium

Cvss 3 Severity Score

9.1

Score breakdown

Status

Package Release Status
bluez
Launchpad, Ubuntu, Debian
bionic
Released (5.48-0ubuntu3.6)
focal
Released (5.53-0ubuntu3.4)
hirsute
Released (5.56-0ubuntu4.3)
impish
Released (5.60-0ubuntu2.1)
jammy Not vulnerable
(5.62-0ubuntu1)
kinetic Not vulnerable
(5.62-0ubuntu1)
lunar Not vulnerable
(5.62-0ubuntu1)
trusty Ignored
(out of standard support)
upstream Needs triage

xenial Needed

Patches:
upstream: https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=838c0dc7641e1c991c0f3027bf94bee4606012f8

Severity score breakdown

Parameter Value
Base score 9.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N