CVE-2021-41229
Published: 12 November 2021
BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates and will not be freed. This will cause a memory leak over time. The data can be a very large object, which can be caused by an attacker continuously sending sdp packets and this may cause the service of the target device to crash.
Notes
| Author | Note |
|---|---|
| sbeattie | introduced in d939483328489fb835bb425d36f7c7c73d52c388 (v4.0) |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
bluez Launchpad, Ubuntu, Debian |
trusty |
Ignored
(end of standard support)
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
| 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 |
Released
(5.62-0ubuntu2)
|
|
| kinetic |
Released
(5.62-0ubuntu2)
|
|
| lunar |
Released
(5.62-0ubuntu2)
|
|
|
Patches: upstream: https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=e79417ed7185b150a056d4eb3a1ab528b91d2fc0 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Adjacent |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |