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Gentoo Linux Security Advisory                           GLSA 202011-01
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: BlueZ: Arbitrary code execution
     Date: November 03, 2020
     Bugs: #749285
       ID: 202011-01

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Synopsis
=======
A vulnerability in BlueZ might allow remote attackers to execute
arbitrary code.

Background
=========
Set of tools to manage Bluetooth devices for Linux.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-wireless/bluez            < 5.55                     >= 5.55

Description
==========
It was discovered that there was a double-free vulnerability in Bluez
after the service discovery which occurs after a Bluetoth Low Energy
(BLE) connection has been established to a device.

Impact
=====
A remote attacker, by enticing a user to connect to a malicious GATT
server or device, could cause the execution of arbitrary code with the
privileges of the user running gatttool client or cause a Denial of
Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All BlueZ users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-wireless/bluez-5.55"

References
=========
[ 1 ] CVE-2020-27153
      https://nvd.nist.gov/vuln/detail/CVE-2020-27153

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202011-01

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5