A bluez security update has been released for Debian GNU/Linux 10 to address several vulnerabilities.
DLA 3157-1: bluez security update
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Debian LTS Advisory DLA-3157-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Sylvain Beucler
October 24, 2022 https://wiki.debian.org/LTS
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Package : bluez
Version : 5.50-1.2~deb10u3
CVE ID : CVE-2019-8921 CVE-2019-8922 CVE-2021-41229 CVE-2021-43400
CVE-2022-0204 CVE-2022-39176 CVE-2022-39177
Debian Bug : 998626 1000262 1003712
Several vulnerabilities were discovered in BlueZ, the Linux Bluetooth
protocol stack. An attacker could cause a denial-of-service (DoS) or
leak information.
CVE-2019-8921
SDP infoleak, the vulnerability lies in the handling of a
SVC_ATTR_REQ by the SDP implementation of BlueZ. By crafting a
malicious CSTATE, it is possible to trick the server into
returning more bytes than the buffer actually holds, resulting in
leaking arbitrary heap data.
CVE-2019-8922
SDP Heap Overflow; this vulnerability lies in the SDP protocol
handling of attribute requests as well. By requesting a huge
number of attributes at the same time, an attacker can overflow
the static buffer provided to hold the response.
CVE-2021-41229
sdp_cstate_alloc_buf 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.
CVE-2021-43400
A use-after-free in gatt-database.c can occur when a client
disconnects during D-Bus processing of a WriteValue call.
CVE-2022-0204
A heap overflow vulnerability was found in bluez. An attacker with
local network access could pass specially crafted files causing an
application to halt or crash, leading to a denial of service.
CVE-2022-39176
BlueZ allows physically proximate attackers to obtain sensitive
information because profiles/audio/avrcp.c does not validate
params_len.
CVE-2022-39177
BlueZ allows physically proximate attackers to cause a denial of
service because malformed and invalid capabilities can be
processed in profiles/audio/avdtp.c.
For Debian 10 buster, these problems have been fixed in version
5.50-1.2~deb10u3.
We recommend that you upgrade your bluez packages.
For the detailed security status of bluez please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/bluez
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
