Debian DLA-2827-1 : bluez - LTS security update

high Nessus Plugin ID 155712

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2827 advisory.

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.
For Debian 9 stretch, these problems have been fixed in version 5.43-2+deb9u5. 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

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the bluez packages.

For Debian 9 stretch, these problems have been fixed in version 5.43-2+deb9u5.

Plugin Details

Severity: High

ID: 155712

File Name: debian_DLA-2827.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/29/2021

Updated: 1/24/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

Vector: CVSS2#AV:A/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2019-8922

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:bluez-hcidump, p-cpe:/a:debian:debian_linux:bluetooth, p-cpe:/a:debian:debian_linux:bluez, p-cpe:/a:debian:debian_linux:bluez-obexd, p-cpe:/a:debian:debian_linux:libbluetooth-dev, p-cpe:/a:debian:debian_linux:bluez-test-tools, p-cpe:/a:debian:debian_linux:libbluetooth3-dbg, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:bluez-test-scripts, p-cpe:/a:debian:debian_linux:bluez-dbg, p-cpe:/a:debian:debian_linux:bluez-cups, p-cpe:/a:debian:debian_linux:libbluetooth3

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/27/2021

Vulnerability Publication Date: 11/12/2021

Reference Information

CVE: CVE-2019-8921, CVE-2019-8922, CVE-2021-41229

Detections

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