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Gentoo Linux Security Advisory                           GLSA 202107-34
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: FluidSynth: Remote code execution
     Date: July 15, 2021
     Bugs: #782700
       ID: 202107-34

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Synopsis
========

A vulnerability was found in FluidSynth that could result in remote
code execution.

Background
==========

FluidSynth is a real-time synthesizer based on the Soundfont 2
specifications.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-sound/fluidsynth       < 2.2.0                    >= 2.2.0 

Description
===========

FluidSynth contains a use-after-free in sfloader/fluid_sffile.c which
occurs when parsing Soundfile 2 files.

Impact
======

A remote attacker could entice a user to open a specially crafted
Soundfont 2 file using FluidSynth, possibly resulting in execution of
arbitrary code with the privileges of the process or a Denial of
Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All FluidSynth users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-sound/fluidsynth-2.2.0"

References
==========

[ 1 ] CVE-2021-28421
      https://nvd.nist.gov/vuln/detail/CVE-2021-28421

Availability
============

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

 https://security.gentoo.org/glsa/202107-34

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 2021 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